SIMPRO-100
Introduction & Specifications
1
PRIM-2400C 21
1.4 SIMPRO-100 Relay
Applications
Figure 1.1 SIMPRO-100 Relay Applications
1.5 SIMPRO-100 Relay
Protection Features
The SIMPRO-100 Relay offers a full range of
elements for motor protection, including:
• Flexible motor thermal element (49) that
provides integrated protection for locked rotor,
running overload, unbalanced current/
negative-sequence current heating, and
repeated or frequent starts.
• Phase, neutral, residual, and negative-
sequence overcurrent (50) elements for
tripping due to motor or cable short circuits.
• Load-loss and load-jam protection.
• Antijogging protection (66) function using
minimum time between starts and number of
starts per hour limit functions.
• Unbalance current (46) element and phase
reversal (47) element protection.
• Optional RTD inputs through an 11-input
internal RTD option or through purchase of
the External RTD Module
(SIMPRO-100-RTD). The SIMPRO-100-RTD
External Module connects to the relay through
a fiber-optic cable and provides 12 RTD
inputs plus an additional dry contact input.
Select the RTD type for each input from a list
of four popular types.
• Optional voltage inputs that support four-wire
wye, open-delta, or single-phase voltage
inputs and provide voltage-based protection
and metering functions. Added functions
include over- and undervoltage elements,
over- and underfrequency elements,
underpower elements, reactive power
elements, power factor elements, plus power
and energy metering.
• Support to control contactors or medium-
voltage motor circuit breakers.
• Fail-safe and nonfail-safe settings for relay
output contacts
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