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SECTION 1 

 

Introduction 

 

Overview 

 
The FirstLine P Maintenance Bypass Switch Cabinet for 160 kVA, 200 kVA, 250 kVA with 
480 V Input and Output is a steel cabinet that attaches to the side of the UPS cabinet, 
thereby extending the cabinet, and providing the maintenance bypass function.  The 
cabinet has conduit attachment points at the top and the bottom for maximum flexibility in 
wiring the source and load power connections.   Please refer to 

Figure 1

 for the outline 

drawing of the cabinet. 
 

 

 

All dimensions in Inches (millimeters) 

 

Figure 1 - The FirstLine P Maintenance Bypass Switch Cabinet 

 

 

 

 

FRONT VIEW

11.85 [301.0]

11.85 [301.0]

20.00 [507.9]

(6) Ø.41 [Ø10.3]

MOUNTING HOLES

ON BOTTOM FEET

4.46 [113.2]

TOP VIEW

.11 [2.8] THICK

DOOR LATCH REQUIRES PHILLIPS

SCREWDRIVER TO OPEN

75.00 [1905.0]

33.35 [847.0]

20.75 [527.0]

LEFT SIDE VIEW

REMOVABLE TOP
COVERS
.08 [2.0] THICK

HINGED FRONT DOOR

Summary of Contents for FLU-160-00

Page 1: ...003 2621 FIRSTLINE P Maintenance Bypass Switch Cabinet 160kVA 250kVA 480V Input Output With SKRU USER MANUAL...

Page 2: ...e P Maintenance Bypass Switch Technical Specifications 18 Table 1 Symbols 4 Table 2 Model Floor Loadings 5 Table 3 Wire Size Requirements 10 Table 4 Recommended Crimp Lugs 10 Table 5 Maximum Current R...

Page 3: ...the top and the bottom for maximum flexibility in wiring the source and load power connections Please refer to Figure 1 for the outline drawing of the cabinet All dimensions in Inches millimeters Fig...

Page 4: ...net MBS than is required for the UPS but special installation requirements must be met the power source connected to the MBS must include circuit protection as specified for the input in the UPS manua...

Page 5: ...vent the possibility of backfeed Read and follow the instructions that came with the associated UPS or emergency lighting system before operating this equipment DANGER This equipment contains lethal v...

Page 6: ...ould only be performed by qualified service personnel knowledgeable of batteries and the required precautions Keep unauthorized personnel away from batteries Read understand and follow all instruction...

Page 7: ...carrier within 15 days of receipt of the equipment 2 Send a copy of the damage claim within 15 days to your service representative Floor Loading When planning the installation consider the cabinet wei...

Page 8: ...t strap or similar device of sufficient strength to tie the upper part of the cabinet to the forklift tower before moving 5 Keep people out of the fall zone If the cabinet topples over stand clear 6 W...

Page 9: ...binet 1 Remove right side panel of UPS and save hardware 2 Butt left side of MBS cabinet up against the right side of the UPS 3 Bolt the cabinets together at 6 locations with the supplied 5 16 hardwar...

Page 10: ...the equipment is the proper type The equipment covered by this manual is 480 V 60 Hz input and output only The Maintenance Bypass Switch Cabinet MBS can be used in delta delta or wye wye applications...

Page 11: ...BREAKER PANELBOARD 1 BREAKER PANELBOARD 2 BREAKER DISPLAY ALARM TEMP ALARM TO UPS REQUEST BYPASS INPUT FRONT PANEL TRIP SWITCH KEYLOCK RELEASE ON BYPASS TRANSFORMER TEMP SWITCHES HT OT REPO SWITCH EXT...

Page 12: ...e Connectors Thomas Betts Single Hole Connectors 3 8 2 0 54210 54110 3 0 54211 54111 4 0 54212 54112 250 kcmil 54213 54174 300 kcmil 54214 54179 350 kcmil 54215 256 30695 112 400 kcmil 54216 54116 500...

Page 13: ...r terminal pads to the load The load may be an external distribution panel etc If neutral is not needed by the load then it does not need to be supplied The wire must be in compliance with Table 3 and...

Page 14: ...a shielded cable with three twisted pairs and is available from a number of sources in various spool lengths Two pairs are required Pair 1 First wire from terminal 2 of the Low Voltage Connection Ter...

Page 15: ...ode It does not matter which type of bypass but bypass via SWMB is the simplest to engage There are signals that support an interlock function to prevent BKR2 from being closed unless BKR3 is open or...

Page 16: ...on Bypass lamp will flash and the inverter will stop and battery supported operation is no longer possible 3 Close BKR2 4 Open BKR3 5 Shut down the UPS if desired by opening SWOUT SWIN SWBY and open t...

Page 17: ...he load is powered via BKR2 MBS mode A fault in the UPS could cause the upstream circuit protection circuit breaker or fuse to operate removing power from both the faulted UPS input and the MBS input...

Page 18: ...eaker 1 Breaker 2 Breaker 3 Adjacent State s Normal closed open closed Overlap Test UPS Test Battery Overlap closed closed closed Normal UPS Unloaded UPS Unloaded closed closed open Overlap Maintenanc...

Page 19: ...Verify load on bypass by observing front panel of UPS 3 Close Breaker 3 UPS Unloaded Maintenance 1 Turn Off UPS 2 Open Breaker 1 Maintenance UPS Unloaded 1 Close Breaker 1 2 Turn On UPS Maintenance L...

Page 20: ...minations usually are the sign of a loose connection but can also signal that a breaker is failing Loose connections should only be serviced after removal of power If the system is powered down consid...

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