Installation Manual Owner's manual

Chapter

Electrical Installation

Before installing, ensure that all incoming power sources are

shut OFF. Failure to observe this practice can result in serious

or even fatal injury and damage to equipment.

Voltage Inputs

There are 3 AC Y-connected voltage inputs of 207VAC (phase-to-phase) and neutral, via

socket meter blades.

The EM920 Power Supply Inputs are the same as the Voltages Inputs

Current Inputs

There are 4 current inputs up to 50A, connected to external CT’s via socket meter blades.

Ground Input

Make sure the EM920 socket is properly connected to ground

Typical Installation

Before installing, ensure that all incoming power sources are

shut OFF and are protected with a slow blow fuse of 2A (SW1

and SW3), and short the current inputs (SW2)

Figure 6: FORM 9 Typical Electrical Installation

FORM 9 Wiring Configurations

There are six wiring configurations shown in Figures 7, 8, 9, 10, 11, 12;

Wiring Configuration Wiring Setup See Figure:

4-wire WYE 3-element using 3 CTs 4Ln3 7

4-wire WYE 3-element connection using 3 PTs, 3 CTs 4Ln3 8

4-wire 3-element delta using 3 CTs 4LL3 9

4-wire 3-element delta connection using 3 PTs, 3 CTs 4LL3 10

3-wire 2-element connection using 2 CTs 3OP3 11

3-wire 2-element connection using 2 PTs, 2 CTs 3OP3 12

Table 1: Wiring Configuration

See parameter setup instructions in the Operation Manual