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Zenith ZBTS T-series 100-1200A, INSTALLATION AND OPERATING INSTRUCTION
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9.7.2 Fuse Disconnector
Fuse Disconnector is needed for OVR
Surge Protection Device. The recom-
mended type is:
• ABB Fuse Disconnector E93/50
- 2CSM277962R1801 E93/50
- 2CSM256333R1801 E9F14GG50
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Fig. 9.17 Fuse Disconnector
—
Fig. 9.18 Suitable place for the Surge Protection Device
and for the Fuse Disconnector
—
9.7 Protection Devices
There are a few suitable protection de-
vices for the Bypass-Isolation automatic
transfer switch that can be added as an
option. If you select the OVR surge pro-
tection device, it is recommended to use
it together with fuse disconnector. The
surge protection device integrated in the
ATS switch (type TPME_) can be used in-
dependently. When ordered, either option
is installed in working order at the
factory.
9.7.1 Surge Protection Device OVR
OVR range is designed to prevent electri-
cal systems and equipment against tran-
sitory surges and impulses caused by
lightning and operations on the electrical
grid. Suitable also for UL installations.
OVR type 2 is designed to protect electric
installations and sensitive equipment
against indirect surges with ensuring a
low protection level (Up). Take a closer
look to phases, max voltage and UL edi-
tion.
For example recommended type:
• OVRT23N40550PTSU.
Replacement Cartridges:
• Phase OVRT240550CU
• Neutral OVRT270NCU
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Fig. 9.16 Surge protection device OVR
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