RBS2C-A
3
SECTION II
INSTALLATION
Before starting the installation, read this section thoroughly. In addition, a through review of the Ratings And
Specifications (Section VI) is recommended. The following installation guidelines should be kept in mind when
installing the controller.
INSTALLATION GUIDELINES
1.
CONTROLLER MOUNTING -
The controller must be surface-mounted vertically. Never mount the
controller immediately beside or above heat generating equipment, or directly below water or steam pipes.
The controller must be mounted in a location free of vibration.
Multiple controllers may be mounted side by side, but allow at least 2 inches (5.08 cm) between controllers
for cooling efficiency.
2.
ATMOSPHERE -
The atmosphere surrounding the controller must be free of combustible vapors, chem-
ical fumes, oil vapor, and electrically conductive or corrosive materials.
The air surrounding the controller must not exceed 55 degrees C (131 degrees F). Minimum air tempera-
ture is 0 degree C (32 degrees F).
3.
LINE SUPPLY -
The controller should not be connected to a line supply capable of supplying more than
100,000 amperes short-circuit current. Short-circuit current can be limited by using an input supply trans-
former of 50 KVA or less, or by using correctly sized current limiting fuses in the supply line ahead of the
controller. Do not use a transformer with less than the minimum transformer KVA listed in Table 7, page
27.
If rated line voltage is not available, a line transformer will be required. If the line supply comes directly
from a transformer, place a circuit breaker or disconnect between the transformer secondary and the con-
troller. If power is switched in the transformer primary, transients may be generated which can damage the
controller. See Table 7 (page 27) for minimum transformer KVA.
Do not use power factor correction capacitors on the supply line to the controller.
A 12-joule metal oxide varistor (MOV) is connected across the controller terminals. If higher energy tran-
sients are present on the line supply, additional transient suppression will be required to limit transients to
150% of peak line voltage.
When a 115 VAC line supply is used, connect the white (common) wire to Terminal L2 and connect the
remaining (hot) wire to Terminal L1.
4.
ISOLATION TRANSFORMER -
While not required, an isolation transformer can provide the following
advantages:
a. Reduce the risk of personal injury if high voltage drive circuits are accidently touched.
®
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