ZL0122-0D
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TM
E51C2A, E51C3A Installation Guide
Supported System
Types
The meter has a number of different possible system wiring configurations (see Wiring Diagrams 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 will display as “----” on the User Interface or as QNAN in the Modbus registers.
CTs
Voltage Connections
System Type
Phase Loss Measurements
Wiring
Diagram
Number
of wires
Qty
ID
Qty
ID
Type
Modbus
Register 130
User Interface:
SETUP>S SYS
VLL
VLN
Balance
Diagram
number
Single-Phase Wiring
2
1
A
2
A, N
L-N
10
1L + 1n
AN
1
2
1
A
2
A, B
L-L
11
2L
AB
2
3
2
A, B
3
A, B, N
L-L with N 12
2L + 1n
AB
AN, BN
AN-BN
3
Three-Phase Wiring
3
3
A, B, C 3
A, B, C
Delta
31
3L
AB, BC, CA
AB-BC-CA
4
4
3
A, B, C 4
A, B, C, N Grounded
Wye
40
3L + 1n
AB, BC, CA
AN, BN, CN AN-BN-CN &
AB-BC-CA
5, 6
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
Description
Voltage Disconnect Switch
Fuse (installer is responsible for ensuring compliance with local requirements. No
fuses are included with the meter.)
Earth ground
X2
X1
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.
• This product is designed only for use with E683 Series current transducers (CTs).
• DO NOT USE CURRENT OUTPUT (e.g. 5A) CTs ON THIS PRODUCT.
Failure to follow these instructions can result in equipment damage.
NOTICE
RISK OF EQUIPMENT DAMAGE
Wiring Symbols
