Phase Comparators

Phase comparators are optionally available and not included in the scope of supplies.

Check phase coincidence before connecting different supply lines for the first time.

Phase Comparators for VDS Systems

If IVIS is used, phase comparison can be performed by means of the phase comparator MS 100 (Figure 76). For more information, refer Voltage Detection Systems (VDS).

Figure 76
Phase comparator MS 100

Phase Comparator for VPIS System

This phase comparator may only be used for the VPIS system in Voltage Present Indicating System VPIS.

Figure 77
Phase comparator for HR system (Type ORION 3.0, Horstmann GmbH)

Check the device before each operation:

• Connect the two plugs of the phase comparator to the two connection points of a VPIS device (Figure 78).

• The lamp must light up: The phase comparator is working properly.

Figure 78
No phase coincidence: indicator lights up

Checking phase coincidence of two panels:

• Connect the plugs of the phase comparator to the same phase connection points of two different VPIS devices (panels) (Figure 79).

• The indicator must not light up. If the phases do not coincide, check the cable connection and, if necessary, exchange.

• After each operation, check the device once more (see item 1).

Figure 79
No phase coincidence: indicator lights up