3 Phase Ct Meter Wiring Diagrams

Ct current transformer wiring connections for commercial form 9s electric meter installation.

3 phase ct meter wiring diagrams. How to wire a three phase kwh energy meter. 120 208v or 277 480v or meter rated 120 or 240v using line to ground voltage. 3 phase 4 wire energy meter installation of 3 phase kwh energy meter. Showing wiring from a current transformer in a cabinet to the test switch and to the meter.

Service voltages higher than 480 volts are available only by negotiation with the company. Current transformer installations single ø 2 wire with ct pt single ø 3 wire single ø 3wire or network with 2 wire ct s 3ø 3 wire with ct s pt s. Note the voltage inputs to the meter must be externally fused via a slyde lock fuse and terminal 11 is the neutral tying down the three voltages 2 the ct cables should be kept as short as possible use 2 5mm cable to maintain accuracy 3 cts match the ratio of the meter being fitted eg 200 5 amp meter 200 amp cts. Polyphase circuits a polyphase 3 phase circuit may be.

The company s nominal secondary service voltages are 120 volts single phase 120 240 volts 3 wire single phase 240 volts 3 phase 3 wire 120 240 3 phase 4 wire 120 208 3 phase 4 wire 277 480 volts 3 phase 4 wire. 12 engineering data engineering data meter socket circuit diagrams 176 data subject to change without notice. 5s wiring diagram 3 wire delta 3 ph 3 wire 2 pt 2 ct glems would like to thank and acknowledge the use of the following meter connection diagrams from dr. 3 phase kwh meter wiring and it s connection diagram as you know that we use two types of electrical appliances regarding it s rated voltage in which some are for single phase and some are required 3 phase just like this we use two types of kwh meter in which one for single phase and 2nd kwh meter 3 phase.

Be aware that these are general diagrams using standard test switches which may not match some utility standards in their configuration and are for reference only. 3 wire network 3 wire 4 wire delta or 4 wire wye. In the above diagram i shown three ammeters current transformers in the above ct wiring diagram i common a wire of all ct s my means that i connect ct one connection with one another. I can also do it without connection with one anther but the main reason behind this is that in real life we do our wiring like above diagram in our main power.