Startco Engineering Ltd. Page 19
FPU-16 Feeder Protection Unit Rev. 0
Pub. FPU-16-M, November, 1997 Downloaded from the Internet, see Disclaimer.
4. INSTALLATION
4.1 GENERAL
A basic feeder-protection system consists of a FPU-16 feeder protection unit, an
ICT-2 interface CT, and three customer-supplied phase CT's. An earth-fault CT
is usually required for earth-fault detection.
4.2 COMPONENT MOUNTING
4.2.1 PANEL-MOUNT CONFIGURATION
Outline dimensions and mounting details for the panel-mount FPU-16 are
shown in Figure 3. The FPU-16 mounts in a 92-mm (3.62-in) square cutout (1/4
DIN) and is secured to the panel by the panel-mount clamp. To mount the
FPU-16, insert it through the panel cutout and slip the panel-mount clamp over
the FPU-16 body. Slide the clamp forward until the latch tabs snap into the
mating holes. Lock the unit in place by tightening the four clamp screws against
the mounting panel.
- - - CAUTION - - -
OVER TIGHTENING THE CLAMP SCREWS WILL DEFORM THE CLAMP AND
CAUSE THE LATCH TABS TO RELEASE.
4.2.2 SURFACE-MOUNT CONFIGURATION
Outline dimensions and mounting details for the surface-mount FPU-16 are
shown in Figure 4. Mount the FPU-16 using M4 (No. 8) screws and external-
tooth lockwashers. Surface-mount FPU-16's have panel-mount-clamp latch
holes and are supplied with panel-mount clamps and hole plugs. This allows
surface-mount units to be panel mounted as described in Section 4.2.1;
however, 100-mm (3.94-in) mounting centres cannot be maintained. If the unit
is surface mounted, insert hole plugs in the latch holes.
4.2.3 ICT-2 INTERFACE CT
Outline dimensions and mounting details for the ICT-2 interface CT are shown in
Figure 5. Locate the ICT-2 near the phase CT's.
4.2.4 EFCT-1 AND EFCT-2 EARTH-FAULT CT’S
Outline dimensions and mounting details for the EFCT-1 and EFCT-2 earth-fault
CT’s are shown in Figures 6 and 7.
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