Mounting methods

•Flush mounting

•Semi-flush mounting

•Semi-flush mounting in a 25° tilt

•Rack mounting

•Wall mounting

•Mounting to a 19″ equipment frame

•Mounting with an RTXP 18 test switch to a 19″ rack

Panel cut-out for flush mounting

•Height: 161.5 ±1 mm

•Width: 165.5 ±1 mm

Relay case and plug-in unit

The relay cases are assigned to a certain type of plug-in unit.

For safety reasons, the relay cases for current measuring relays

are provided with automatically operating contacts for short

circuiting the CT secondary circuits when a relay unit is

withdrawn from its case. The relay case is further provided with

a mechanical coding system preventing the current measuring

relay units from being inserted into relay cases intended for

voltage measuring relay units.

Selection and ordering data

The relay type and serial number label identifies the protection

relay. The label is placed above the local HMI on the upper part

of the plug-in-unit. An order code label is placed on the side of

the plug-in unit as well as inside the case. The order code

consists of a string of letters and digits generated from the

relay’s hardware and software modules.