ABB Relion REG670, Technical Manual

Page: 1212 / 1298

21.3.6 External current transformer unit
5
7
[2
.2
4
]
89
[3
.5
]
xx06000233.vsd
482.6 [19]
Dimension
mm [inches]
IEC06000233 V1 EN
Figure 555: Dimension drawing of summation current transformers
21.4 Mounting alternatives
21.4.1 Flush mounting
21.4.1.1 Overview
The flush mounting kit can be used for case sizes:
• 1/2 x 19”
• 3/4 x 19”
• 1/1 x 19”
• 1/4 x 19” (RHGS6 6U)
Only a single case can be mounted in each cut-out on the cubicle panel, for class IP54
protection.
Flush mounting cannot be used for side-by-side mounted IEDs when
IP54 class must be fulfilled. Only IP20 class can be obtained when
mounting two cases side-by-side in one (1) cut-out.
To obtain IP54 class protection, an additional factory mounted sealing
must be ordered when ordering the IED.
Section 21
1MRK502052-UEN B
IED hardware
1206
Technical manual