Siemens 7KM1020-0BA01-1DA0, Manual, Page: 33 / 94

Connection
4.3 Connection examples
PAC1020
Equipment Manual, 05/2020, L1V30610008B-01
31
Example connections
1. 3 - phase measurement, 4 conductors, unbalanced load, without voltage transformer,
with 3 current transformers
Connection type 3P4W
* The fuses are only used for cable protection.
All commercially available miniature circuit breakers up to 20 A (C) can be used.
** Connection of supply voltage
*** Install a short-circuit device. Protection against overvoltage when the secondary transformer
circuit is open.
Figure 4-2 Connection type 3P4W, without voltage transformer, with 3 current transformers
2. 3-phase measurement, 4 conductors, unbalanced load, with voltage transformer, with
3 current transformers
Connection type 3P4W
* The fuses are only used for cable protection.
All commercially available miniature circuit breakers up to 20 A (C) can be used.
** Connection of supply voltage
*** Install a short-circuit device. Protection against overvoltage when the secondary transformer
circuit is open.
Figure 4-3 Connection type 3P4W, with voltage transformer, with three current transformers