13
Figure 3.9 — Connect Signal Wires
(Single-phase)
4.1 OPERATE TRANSFER SWITCH
Operate the transfer switch at least once each month. This can be
done by performing a NORMAL TEST of the system. Because the
System Test switch only simulates failure of the UTILITY power
source, service is interrupted only during the actual transfer of
the load.
4.2 CLEAN AND INSPECT
TRANSFER SWITCH
Protect the transfer switch against construction grit, metal chips,
excessive moisture and other harmful dirt at all times. At least
once each year, turn OFF all power supplies to the switch, then
brush and vacuum away dust and dirt that has accumulated inside
the enclosure. After cleaning, inspect the transfer switch carefully.
Look for evidence of arcing, burning, hot spots, charring and other
damage. If any of these are found, have the switch assembly
checked by an authorized service technician.
4.3 LUBRICATION
Operating parts inside the transfer mechanism have been properly
lubricated at the time of assembly. Under normal conditions, no
additional lubrication should be required. The service technician
should lubricate all recommended points whenever major transfer
mechanism components are replaced.
Use only specified greases to lubricate contac-
tor parts. DO NOT USE ANY SUBSTITUTES.
Use the following lubricants for the:
1. Main Contacts (Between movable contact and busbars).
Dow Corning (Molykote) BR2 Plus (Mfg. by Dow Corning •
Co., USA)
Liqui-Moly (Mfg. by DAI TO Co., Ltd., Japan)•
2. Operating Mechanism (Used on the actuator and other parts
of the contactors. Excluding the movable contacts).
Mobilgrease 28 (Mfg. by Mobil Oil Co.)•
Mobiltemp SHC 32 (Mfg. by Mobil Oil Co.)•
Polo Moly Complex Grease #NLG12 (Mfg. by Polo Lubricants, •
USA)
Rheolube 363 (Mfg. by Nye Lubricants Inc., USA)•
4.4 MAIN CURRENT CARRYING
CONTACTS
At least once annually, have an Authorized Service Technician
check the main current-carrying contacts in the transfer mecha-
nism. They will repair or replace major components that have been
found defective.
4.5 BATTERIES
The batteries in the transfer switch controller are of the nickel
metal hydride type. The batteries are rechargeable. Replace with
Panasonic catalog no. HHR75AAA or equivalent every three (3)
years.
Section 4 — Maintenance
HTS “Wn” Type Transfer Switch
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