GE EPM 5200 Connecting the Voltage Circuit, Selecting the Voltage Fuses, Control Power, Current

CHAPTER 3: ELECTRICAL INSTALLATION

OPTION 2: ISOLATING A CT CONNECTION REVERSAL USING VOLTAGE READINGS

!Remove potential connections to terminals 6 and 7. Observe the KW reading. It should be positive.

!If negative, reverse the CT wires on terminals 8 and 9.

Connect terminal number 6 potential. If KW decreases to about zero, reverse CT wires on terminals 10 and 11.

Connect terminal number 7 potential. If KW is one-third of expected reading, reverse CT wires to terminals 12 and 13.

3.3: Connecting the Voltage Circuit

For proper meter operation, the voltage connection must be maintained. The voltage must correspond to the correct terminal.

The cable required to terminate the voltage sense circuit should have an insulation rating greater than 600V AC and a current rating greater than 0.1 A.

3.4: Selecting the Voltage Fuses

We strongly recommend using fuses on each of the sense voltages and the control power, although connection diagrams do not show them. Use a 1 Amp fuse on each voltage input.

The meter can handle a maximum voltage of 150V phase to neutral. PTs are required for higher voltages. Suffix -G extends the maximum direct voltage to 300V phase to neutral, 600 volt phase to phase.

3.5: Connection to the Main Power Supply

The meter requires separate control power to operate. Listed are the five different power supply options and corresponding suffixes.

CONTROL POWER	OPTION SUFFIX	CURRENT
120V AC	115 A	0.1 AAC
240V AC	230 A	0.05 AAC
12V DC	D4	0.10 ADC
24-48V DC	D	0.25-0.5 ADC
125V AC/DC (universal)	D2	0.10 AAC or DC

Table 3.2: Control Power and Current

Note: For DC-powered units, polarity should be observed. Connect the negative terminal to L and positive terminal to L1. An earth ground connection to chassis is mandatory for normal operation (terminal three). Do not ground the unit through the negative of the DC supply.

Note: Externally fuse power supply with a slow-blow 3 Amp fuse.

3.6: Electrical Connection Installation

Choose the diagram that best suits your application and maintain the CT polarity. Follow the outlined procedure to verify correct connection. IMPORTANT: For PT connections only, short terminals 3 and 4. Connect local ground to terminal 3. This protects the unit from spikes and transients.

8 EPM 5000 series Advanced Power Meters GE Multilin