Accessories

Function

Cardew C is used if the device along with the IMD is connected to the secondary connection of an MV/LV transformer (according to the rules and conventions that apply in the various countries).

It protects the low-voltage (LV) installation against over voltage hazards. It is connected to the secondary connection of the transformer. Cardew C can be used on the following systems:

• U < 1000 V AC

• U < 300 V DC

Selection table

Un: Nominal Phase-to-Phase Voltage of AC System

Ui: Arcing Voltage

Type of Cardew C

Accessible neutral

Not accessible neutral

U ≤ 380 V

U ≤ 220 V

400 V < Ui ≤ 750 V

250 V

380 V < U ≤ 660 V

220 V < U ≤ 380 V

700 V < Ui ≤ 1,100 V

440 V

660 V < U ≤ 1,000 V

380 V < U ≤ 660 V

1,100 V < Ui ≤ 1,600 V

660 V

1,000 V < U ≤ 1,560 V

660 V < U ≤ 1,000 V

1,600 V < Ui ≤ 2,400 V

1,000 V

Dimensions

Mounting

• Cardew C mounted directly on busbars

• Mounting with plate-mounted base

Connection

Refer to the instruction sheet for wiring information.

Function

The voltage adaptors PHT1000 and IFL12VA1T are used to connect IMD and the device respectively to ungrounded systems higher than 480 V AC. The wire connecting voltage adaptor to IMD and the device has to have the same voltage rating as the monitored network.

Dimensions

IFL12VA1T

PHT1000

Mounting

Connection

Refer to the instruction sheet for wiring information.