Phase Barriers - ABB OTM_C Series Installation And Operating Instruction

9.1 Phase barriers

Phase barriers or shrouds (see section 8.3) must be used to maintain a clearance of 1 inch on the
motorized change-over switch types: OTM600U_C_, if the conductors are wider than 39 mm /1.54 in
(phase barrier 68838), on OTM800-1200U_C_, if the lugs are wider than 54 mm /2.13 in (phase barrier
68912).
Phase barriers 68912 must be used on motorized change-over switches types OTM1000-2500_C_ if
the voltage is > 415 V. Phase barriers CXBY69470 must be used on OTM3200E_C.
The types for the package of 6 barriers are: 68838 = OTB800/6C, 68912 = OTB1600/6C and
CXBY69470= OTB4000/6C.
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M M M M
M a n . M a n .
M a n .
Figure 9.2 OTM600U_C, OTM800-1200U_C_ , OTM1000-2500E_C_ and OTM3200E_C_
mounting of phase barriers
1SCC303002M0206 l ABB Installation and operating instructions, 34OTM_C rev. F l 41
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9. UL standard switches
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