Mini Meter MMU
Installation Manual
PK-A3244-10-02-0A
WEB VERSION
WEB VERSION
TABLE OF CONTENTS
1 Warnings
1.1 Warnings and Cautions
2 Product Description
2.1 General Description
2.2 Meter Features
2.3 Meter Certifications
2.4 Physical Description
2.4.1 Single Meter
2.5 Applications
3 Technical Specifications
3.1 Model Number Description
3.1.1 Individual Meter Model Numbers
3.1.2 MMU Model Numbers
3.2 Electrical and Environmental Specifications
3.3 Input/Output Connections and User Display
4 Installation Instructions
4.1 Preparation
4.2 List of Materials
4.3 Mounting the Enclosure
4.3.1 Mounting Location
4.3.2 Drilling Conduit Holes
4.3.3 Mounting Procedure and Conduit Installation
4.4 Installation of Voltage Lines
4.5 Variations and Installation of Current Transformers
4.6 Testing the Installation
4.7 Securing the Enclosure
5 Maintenance
6 Troubleshooting/FAQ
7 Warranty
8 Contact Information
4
4
5
5
5
5
5
5
6
6
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6
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8
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11
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12
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WEB VERSION
1 WARNINGS
1.1 Warnings and Cautions
The following section contains installation and wiring instructions for Mini Meter MMUs. If
technical assistance is required at any point during the installation, contact information can be
found at the end of this manual. Leviton is not responsible for damage to the meter caused by
incorrect wiring.
4
• WARNING: TO AVOID FIRE, SHOCK OR DEATH; turn off all power supplying the
equipment before performing any wiring operations. Use a properly rated voltage
sensing device to confirm that power is off.
• Failure to follow these warnings could result in serious injury or death.
• Installation of electric meters requires working with possibly hazardous voltages.
These instructions are meant to be a supplement to aid trained, qualified professionals.
• Installations should be done in accordance with local codes and current National
Electric Code requirements.
• Equipment used in a manner not specified by this document impairs the protection
provided by the equipment.
WARNING
WEB VERSION
2 PRODUCT DESCRIPTION
2.1 General Description
The Leviton Mini Meter is a self-powered, current transformer (CT) rated electronic
kilowatthour (kWh) meter designed for permanent connection to an electrical service.
Mini Meters come in single element (2-wire) and dual element (3-wire) configurations.
This guide is for use with Mini Meter Multiple Meter Units (MMUs).
2.2 Meter Features
• Revenue-grade accuracy with solid-core or easy to install split core CTs
• Built in LCD and external mechanical counter
• Multiple load monitoring with a single meter
• AMR compatible isolated pulse outputs
• Reverse-phase LCD indicator
• 5-year warranty
2.3 Meter Certifications
• UL Approved (100A & 200A models only) for use in the US or Canada
• Conforms to accuracy requirements set forth in ANSI C12.1 and C12.16
• Certified to California Division of Measurement Standards
• Approved by the California Energy Commission for use in the California Solar
Initiative’s Performance Based Incentive Program
• Approved by State of Maryland Public Service Commission in accordance with
applicable ANSI C12.1 requirements
2.4 Physical Description
2.4.1 Single Meter
5
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N
4.620
2.8452.150
3.525
5.130
5.130
1.107
1.282
.125
Figure 1 - Single Mini Meter Case Dimensions
WEB VERSION
3 TECHNICAL SPECIFICATIONS
3.1 Model Number Description
3.1.1 Individual Meter Model Numbers
The Mini Meter model number format is shown below:
2 PRODUCT DESCRIPTION
2.5 Applications
• Apartments • Campgrounds
• Marinas • Anywhere accurate electric submetering is needed
• Mobile Home Parks
6
Figure 2 - Mini Meter Model Number Format
ABCDE–XYZ
Series
CT Type
M = OEM Module
SC = Solid Core
SP = Split Core
NC = No CTs
Single/Dual Element
S = Single Element
D = Dual Element
Amperage Rating
Example:
MDNCT-1SC
1 = 100A
Output
2 = 200A
NC = Mechanical counter resolution 0.1 kWh
Mechanical counter resolution 1.0 kWh TC =
Option of Terminal
T = Normal Terminal
WEB VERSION
3 TECHNICAL SPECIFICATIONS
3.1 Model Number Description
3.1.2 MMU Model Numbers
The MMU model number format is shown below:
Figure 3 - MMU Model Number Format
ABC ED–XYZ
Series
6 = Mini Meter Gen 3 MMU
Enclosure Size
M = Medium
L = Large
X = Extra Large
Configuration
Examples:
6M205-CFG
6L307-KIT
6X319-CFG
CFG = Configured per Customer request
Phasing Configuration
KIT = Un-Configured, for configuration in field
2 = Two Phase Applications
Three Phase Applications3=
Number of Meters
02/03/04 = For Medium Size Enclosures
05/.../08 = For Large Size Enclosures
09/.../19 = For Extra Large Size Enclosures
** For finished goods ending on KIT:
Large Enclosure can hold up to 7 meters
and Extra Large Enclosure can hold up to 18 meters
7
WEB VERSION
Input Configurations 1 Phase, 2 wire
1 or 2 Phase, 3 wire
Supply Voltage Range
(L1 or L2 to Neutral)
Min. 102 VAC Max. 138 VAC
Maximum Input Power 8 VA
Maximum Rated Current
1
220 A primary for 200 A models
110 A primary for 100 A models
0.11 A secondary for 0.1 A secondary models
0.22 A secondary for 0.2 A secondary models
Line Frequency 50-60 Hz
Power Factor Range 0.5 to 1.0, leading or lagging
Accuracy +/- 0.5% of registration @ 1.0pf. 2 to 200 A
+/- 0.75% of registration @ 0.5pf, 2 to 200 A
Operating Temperature Range -30 to +70 degrees C
Rated Pollution Degree
2
2
Rated Relative Humidity 80%
Branch Fuse Holder
Klemsan ASK2 or equiv.
500 V, 6.3 A, 6 mm2
Branch Fuses
Large/XL Enclosure: Littlefuse, Inc.
0235003.HXP or equiv.
Medium Enclosure: Littlefuse, Inc.
0235001.HXP or equiv.
250 V, 3 A, fast acting, short time lag
250 V, 1 A, fast acting, short time lag
Terminal Blocks Mini Meter
Dinkle/International Connector
EK508-11P or equiv.
MMU: Molex 0387800105 or Cinch Barrier
Block Series 141 or equiv.
4.4 in-lb of torque maximum
12 in-lb of torque maximum
3 TECHNICAL SPECIFICATIONS
8
Table 1 - Electrical and Environmental Specifications
1
Product approved for use with included Leviton Current Transformers, as follows:
• 200A:
Part Numbers CDA02-x12 (CDA02-B12, CDA02-R12, CDA02-L12, CDA02-212,
CDA02-312) for Solid Core, 0.72" Diameter CTs or CTD02-K16 for Split Core 1" CTs
• 100A:
Part Numbers CDA01-x12 (CDA01-B12, CDA01-R12, CDA01-L12, CDA01-212,
CDA01-312) for Solid Core, 0.72" Diameter CTs or CTD01-K16 for Split Core 1" CTs
2
Pollution Degree 2: normally only non-conductive pollution occurs. Occasionally, however,
a temporary conductivity caused by condensation must be expected.
3.2 Electrical and Environmental Specifications
Mini Meters fall under UL Circuit Category III: a device for measurements performed
in the building installation. The electrical and environmental specifications for Mini
Meters are given in the table below
WEB VERSION
3 TECHNICAL SPECIFICATIONS
3.3 Input/Output Connections and User Display
Voltage Inputs (wire connections) Description
L1 Black wire, voltage input, Line 1,120 V with
respect to neutral
N White wire, Neutral input
L2 Red wire, voltage input, Line 2, 120 V with
respect to neutral (MMD models only)
CT Inputs
CT1 : X1 Current Transformer input, CT1. Black or
Wh/Blk (striped) wire of CT1
CT1 : X2 Current Transformer input, CT1. White wire
of CT1
CT2 : X1 Current Transformer input, CT2. Red or
Wh/Rd (striped) wire of CT2 (MMD
models only)
CT2 : X2 Current Transformer input, CT2. White wire
of CT2 (MMD models only)
9
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N
Figure 4 - Mini Meter Connections and Display
Table 2A - Input Connections
LCD
Display
Load
LED
Sealing
Studs
WEB VERSION
LED Indicators Description
Load LED (green) 50% duty cycle LED to verify proper
meter function when connected to a
load. At 200 watts, LED will flash 1.5
minutes on, 1.5 minutes off; with no
load, LED will remain on or off
LCD Display LCD display that shows total kWh
(also displays kw demand,
instantaneous kw, error codes if
applicable, and more information
upon boot. Refer to the mini meter
manual for complete information)
3 TECHNICAL SPECIFICATIONS
10
Table 3 - Display Indicators
Table 2B - Output Connections
3.3 Input/Output Connections and User Display
Outputs Description
10, Isolated Output (10 Wh/P, Kh = 10) Isolated pulse output: 5 watthours
on, 5 watthours off, referenced to
ISOL COM
100, Isolated Output (100 Wh/P, Kh=100) Isolated pulse output: 50 watthours
on, 50 watthours off, referenced to
ISOL COM
1000, Isolated Output (1 kWh/P, Kh=1000) Isolated pulse output: 500 watthours
on, 500 watthours off, referenced to
ISOL COM
ISOL COM Isolated common for 10/100/1000
isolated outputs
Counter (kh = 100 or kh = 1000)* For 12 V DC electro-mechanical
counter
+12 VDC +12VDC @ 10ma Max output
(MMS and MMD models only) (Not Isolated for pre-wiring only)
* Recommended Leviton Mechanical Counters part numbers are:
MPCTR-1KW (1kWh) and MPCTR-TKW (0.1kWh).
WEB VERSION
4 INSTALLATION INSTRUCTIONS
4.1 Preparation
1. Verify the model number and electrical specifications of the device being
installed to confirm they are appropriate for the intended electrical service (see
Section 3).
2. Consult local codes for any possible permits or inspections required before
beginning electrical work.
3. Ensure the conduit for the installation is flexible and non-metallic. For outdoor
applications conduit and conduit fittings must be rated UL Type 4X for outdoor
enclosures. Failure to use the appropriate conduit impairs the degree of
equipment protection.
4. Make sure all tools to be used during installation have proper insulation
ratings.
5. Look inside the MMU and electrical panel for possible exposed wire, broken
wire, damaged components or loose connections.
4.2 List of Materials
• Mini Meter MMU and associated mounting materials.
• Line 1, Line 2, and Neutral hook-up wires as needed for the electrical service.
Wires must be 18 AWG or larger and insulated for 300 VAC min
(NOT INCLUDED).
• Current Transformers (CTs): This product is designed for use with Leviton CTs;
see Section 3.2 for details (NOT INCLUDED IN ALL MODELS).
• Flexible, non-metallic conduit and fittings; UL Type 4X for outdoor applications
(NOT INCLUDED).
4.3 Mounting the Enclosure
4.3.1 Mounting Location
• MMUs require a switch or circuit breaker as part of the building installation.
• The switch or circuit breaker must be marked as the disconnecting device for
the MMU.
• It is recommended that the MMU be mounted near the disconnecting device in
an area with adequate ventilation.
• The MMU should not be positioned in a manner that makes it difficult to operate
the disconnecting device.
• Ensure that the CT and voltage lead lengths (and conduit lengths) are capable
of reaching the enclosure from the breaker panel.
• If a suitable mounting location near the panel cannot be found, additional inline
fuses or circuit breaker may be required in accordance with NEC regulations.
11
WEB VERSION
4 INSTALLATION INSTRUCTIONS
4.3.2 Drilling Conduit Holes
Please refer to the figure below for drilling conduit openings.
Conduit hole sizes must be appropriate to fittings. Care should be exercised to
keep drill bit away from components inside the MMU. For large (19" x 15" x 8")
and extra-large (29" x 21" x 10") enclosures conduit holes should be located so
as not to interfere with the installation of wires or viewing of meters. UL Type 4X
conduit and fittings must be used in order to maintain the outdoor rating of
the enclosure.
12
2-3/4 in
7/8 in
Figure 5
Cutting Section
(large and extra large MMUs)
Align
between
Latches
Latch
Drill Area
WEB VERSION
4 INSTALLATION INSTRUCTIONS
4.3.3 Mounting Procedure and Conduit Installation
1. Attach the mounting brackets to the back of the enclosure with the four
provided screws as shown in Figure 6.
2. Fasten the enclosure to the selected surface via mounting holes.
3. Verify that the enclosure is not loose and that all connections are secure.
4. Attach the conduit between enclosure and load center, routing wires as
necessary for later use.
5. Make sure the conduit fittings are aligned properly and tightened securely to
prevent moisture from entering the enclosure (outdoor applications).
4.4 Installation of Voltage Lines
WARNING: TO AVOID FIRE, SHOCK OR DEATH, ensure service is disconnected
before any connections are made. Verify that branch circuit fuse specifications
meet local electric codes (see section 3.2).
For Small and Medium Enclosures
1. Field wired voltage connections are made to the Mini Meter terminal block. The
rated torque for these terminal blocks is 4.4 in-lb, and can be used with solid and
stranded copper wires, at 12-18 AWG.
2. Connect 300 V min. insulated wiring for Line voltages and Neutral to the
appropriate locations in the breaker panel, in accordance with all national and
local electrical codes; see Figure 10 for 1Ph, 2-wire applications; Figure 11 for 1 or
2 Ph, 3-wire applications; Figure 12 for 3 Ph, 4-wire applications.
3. Route wires through the conduit if not already done.
4. Trim the wire to the appropriate length to avoid coils of excess wiring.
5. For connections to the Mini Meter terminal, strip wiring to approximately .300
inches and connect to the appropriate terminals. Wires should be tightened so that
they are held snuggly in place, but do not to over-tighten, as this may compress
and weaken the conductor.
13
Figure 6 - Mounting the Enclosure
WEB VERSION
4 INSTALLATION INSTRUCTIONS
4.4 Installation of Voltage Lines
WARNING: TO AVOID FIRE, SHOCK OR DEATH, ensure service is disconnected
before any connections are made. Verify that branch circuit fuse specifications
meet local electric codes (see section 3.2).
For Large and Extra Large Enclosures
1. Field wired voltage connections are made to the MMU terminal block (shown
in Figure 7). The maximum approved torque rating for this Molex terminal block
is 12 in-lb.
2. Connect 18 AWG min., 300 V min. insulated wiring for Line voltages and Neutral to
the appropriate locations in the breaker panel, in accordance with all national and
local electrical codes; see Figure 10 for 1Ph, 2-wire applications; Figure 11 for 1 or
2 Ph, 3-wire applications; Figure 12 for 3 Ph, 4-wire applications.
3. Route wires through the conduit if not already done.
4. Trim the wire to the appropriate length to avoid coils of excess wiring.
5. For connections to the voltage terminal block (see example in Figure 7), strip
wiring to approximately .300 inches and connect to the appropriate terminals.
Wires should be tightened so that they are held snuggly in place, but do not to
over-tighten, as this may compress and weaken the conductor.
4.5 Variations and Installation of Current Transformers
WARNING: TO AVOID FIRE, SHOCK OR DEATH, always open or disconnect
the circuit from the power distribution system of a building before installing or
servicing current transformers.
In accordance with NEC, CTs may not be installed in any panel board where they
exceed 75% of the wiring space of any cross-sectional area.
14
Figure 7 - Voltage Terminal Block
L1
L2 L3 N
WEB VERSION
4 INSTALLATION INSTRUCTIONS
4.5 Variations and Installation of Current Transformers
General Requirements
• Leviton provided CT leads are 48 inches minimum. Wire insulation should be
stripped so that the bare conductor length that connects to the meter terminal
block does not exceed 0.300 inches.
• CTs should be securely fastened such that they will not slide down to live
terminals.
• Wires should be tightened so that they are held snuggly in place, but do not to
overtighten, as this may compress and weaken the conductor.
• For 1 or 2 Ph 3-Wire electrical panels, current and voltage inputs must be
installed "in phase" for accurate readings (e.g. CT1 on Line 1, CT2 on Line 2);
see Figure 11.
• For 3 Ph 4-wire electrical panels, see Figure 12 and follow factory-provided
meter schedules for correct CT locations.
CT Variations
• Leviton solid core CTs (Figure 8): In accordance with CT label, the LINE side
of CT must face incoming Line. White lead connects to X2 of CT connection
(CT1:X2 or CT2:X2). Black or red (solid or striped) lead connects to X1 of the
corresponding CT connection (CT1:X1 or CT2:X1).
Installing solid core CTs
1. Route CT wires through the conduit if not already done.
2. Trim the wire to the appropriate length to avoid coils of excess wiring.
3. At MMU, strip insulation from wires to approximately .300 inches.
4. Connect CT leads to the appropriate meter as described above.
5. With power turned off, disconnect each monitored conductor and slide
on a CT, ensuring the CT is correctly oriented as noted above.
6. Reconnect the conductors.
15
Figure 8 - Leviton Solid Core CTs
WEB VERSION
4 INSTALLATION INSTRUCTIONS
4.5 Variations and Installation of Current Transformers
• Leviton split core CTs (Figure 9): The side with the white dot, H1, must face the
incoming LINE. White wire connects to X2 terminal, black wire connects to X1
terminal.
Installing split core CTs
1. Route CT wires through conduit if not already done.
2. Trim the wire to the appropriate length to avoid coils of excess wiring.
3. Strip wiring to approximately .300 inches.
4. Connect the CT leads to the appropriate meter as described above.
5. With power to the conductors turned off, place one CT around each
conductor, ensuring that the white dot is facing the line side.
Failure to install CTs in the correct orientation will lead to inaccurate meter
readings. Figure 10 through Figure 12 show wiring diagrams for the various
voltage configurations.
16
Figure 9 - Leviton Split Core CTs
WEB VERSION
4 INSTALLATION INSTRUCTIONS
17
Figure 10: 1-Phase, 2-Wire Hookup Diagram
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 100 1000
Counter
+12VDC
12COM
L2N
L1 N
LINE
APT# 1
L1
APT# 2
L1
LOAD LOAD
APT# 3
L1
APT# 4
L1
LOAD LOAD
APT# 5
L1
APT# 6
L1
LOAD LOAD
APT# 7
L1
APT# 8
L1
LOAD
BREAKER PANEL
MULTIPLE METER
UNIT CABINET
LOAD
APT# XX
L1
APT# XX
L1
LOAD LOAD
N
NL1
FUSE or BREAKER
L1
WEB VERSION
4 INSTALLATION INSTRUCTIONS
18
Figure 11: 2-Phase (split phase), 3-Wire Hookup Diagram
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1 N
LINE
LOAD
LOAD
LOADLOAD
LOADLOAD
LOADLOAD
LOADLOAD
BREAKER PANEL
MULTIPLE METER
UNIT CABINET
FUSE or BREAKER
N NL1 L2
L2
APT# 1
L1
APT# 2
L1
APT# 1
L2
APT# 2
L2
APT# 3
L1
APT# 4
L1
APT# 3
L2
APT# 4
L2
APT# 5
L1
APT# 6
L1
APT# 5
L2
APT# 6
L2
APT# 7
L1
APT# 8
L1
APT# 7
L2
APT# 8
L2
APT# XX
L1
APT# XX
L1
APT# XX
L2
APT# XX
L2
L2L1
WEB VERSION
4 INSTALLATION INSTRUCTIONS
19
Figure 12: 3-Phase, 4-Wire Hookup Diagram
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N L1
X1 X2
CT1 CT2 (Kh) Isol
Isolated Output
X1 X2 10 1001000
Counter
+12VDC
12COM
L2N
L1 N
LINE
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
BREAKER PANEL
MULTIPLE METER
UNIT CABINET
N NBAC
L2 L3
APT# 1
ø
A
APT# 2
ø
A
APT# 1
ø
B
APT# 2
ø
B
APT# 3
ø
C
APT# 4
ø
C
APT# 3
ø
A
APT# 4
ø
A
APT# 5
ø
B
APT# 6
ø
B
APT# 5
ø
C
APT# 6
ø
C
APT# 7
ø
A
APT# 8
ø
A
APT# 7
ø
B
APT# 8
ø
B
APT# 1
ø
B
APT# 2
ø
B
APT# 1
ø
C
APT# 2
ø
C
C
FUSE or BREAKER
A B
WEB VERSION
4 INSTALLATION INSTRUCTIONS
5 MAINTENANCE
4.6 Testing the Installation
Testing Voltage
The LCD will turn on when the Mini Meter has the proper power supply. Voltage
should also be tested using an AC Voltmeter to verify that the voltage across
voltage line terminals (L1 to Neutral and L2 to Neutral) is not in excess of the
maximum rated voltage in section 3.2.
CT Reverse Phase Indicator
Reverse phase is indicated on the LCD in the lower left corner of the display.
If an arrow is displayed, power down the voltage supply and verify that all CTs
are installed correctly.
Load LED
The load LED is described in section 3.3. This LED should be cycling at 50% duty
cycle when the meter is connected properly and a sufficient load is applied.
4.7 Securing the Enclosure
In accordance with safety requirements, MMUs must be secured using the
provided key lock once installation is complete. The purpose of the lock is to
prevent access to live parts that pose potential safety risks. To install the lock,
slide through the provided holes on the clamp side of the enclosure and fasten
securely.
Properly installed meters with sound connections and secure conduit fittings should not
require user maintenance. If the meter is functioning abnormally, consult the Troubleshooting/
FAQ guide. If the answer cannot be found there, contact Technical Support.
20
WEB VERSION
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