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Installation Guide
Power Monitoring
E50B1, E50C2, E50C3
Supported System
Types
Wiring Symbols
ZL0103-0C
Page 7 of 26
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The meter has a number of different possible system wiring configurations (see Wiring section). To configure the meter, set the
System Type via the User Interface or Modbus register 130 (if so equipped). The System Type tells the meter which of its current
and voltage inputs are valid, which are to be ignored, and if neutral is connected. Setting the correct System Type prevents
unwanted energy accumulation on unused inputs, selects the formula to calculate the Theoretical Maximum System Power,
and determines which phase loss algorithm is to be used. The phase loss algorithm is configured as a percent of the Line-to-Line
System Voltage (except when in System Type 10) and also calculates the expected Line to Neutral voltages for system types that
have Neutral (12 & 40).
Values that are not valid in a particular System Type display as "----" on the User Interface or as QNAN in the Modbus registers.
CTs
Voltage Connections
Number
Qty
ID
Qty
ID
of wires
Single-Phase Wiring
2
1
A
2
A, N
2
1
A
2
A, B
3
2
A, B
3
A, B, N
Three-Phase Wiring
3
3
A, B, C 3
A, B, C
4
3
A, B, C 4
A, B, C, N Grounded
To avoid distortion, use parallel wires for control power and voltage inputs.
The following symbols are used in the wiring diagrams on the following pages.
Symbol
X1
X2
RISK OF EQUIPMENT DAMAGE
• This product is designed only for use with 1V or 0.33V current
transducers (CTs).
• DO NOT USE CURRENT OUTPUT (e.g. 5A) CTs ON THIS PRODUCT.
• Failure to follow these instructions can result in overheating and
permanent equipment damage.
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Other companies' trademarks are hereby acknowledged to belong to their respective owners.
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System Type
Type
Modbus
User Interface:
Register 130
SETUP>S SYS
L-N
10
1L + 1n
L-L
11
2L
L-L with N 12
2L + 1n
Delta
31
3L
40
3L + 1n
Wye
Description
Voltage Disconnect Switch
Fuse (installer is responsible for ensuring compliance with local requirements. No
fuses are included with the meter.)
Earth ground
Current Transducer
Potential Transformer
Protection containing a voltage disconnect switch with a fuse or disconnect circuit
breaker. The protection device must be rated for the available short-circuit current at
the connection point.
CAUTION
PowerMeterStore
Phase Loss Measurements
VLL
VLN
Balance
AN
AB
AB
AN, BN
AN-BN
AB, BC, CA
AB-BC-CA
AB, BC, CA
AN, BN, CN AN-BN-CN &
AB-BC-CA
1.888.610.7664
.com
TM
Wiring
Diagram
Diagram
number
1
2
3
4
5, 6
09141
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