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23. Mounting methods
The RER620 can be installed as flush mounted. Fur-
instrument cabinet by means of 19” mounting pan-
els available with cut-outs for one or two relays. For
the routine testing purposes, the relay cases can be
equipped with ABB Flexitest (FT) test switches,
type FT-1 or FT-19R, which can be mounted side by
side or below the relay cases.
Mounting methods:
• Flush mounting
• Mounting with Flexitest (FT) test switches to a
Requirements for installation:
• Panel cut-out of 9.76 x 6.38 inches (248 x 162 mm)
• Depth behind the panel 6.02 inches (153 mm)
24. protection and control relay case and drawout
unit
For safety reasons, the protection and control relay
cases are provided with automatically operating
contacts for short-circuiting the CT secondary cir-
cuits when a Protection and control relay unit is
withdrawn from its case. The relay case is further
provided with a mechanical coding system prevent-
ing current measuring relay units from being in-
serted into a relay case for a voltage measuring re-
lay unit and vice versa, i.e. the relay cases are
assigned to a certain type of relay draw-out unit.
Figure 8: Flush
mounting a case into
a panel cut-out
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