4
Settings Calculation
SIMPRO-100
58 PRIM-2400C
current inputs only, the trip will occur
approximately 0.5 seconds after the motor start is
initiated. When the relay is equipped with voltage
inputs, the trip will occur approximately 0.5
seconds after ac voltages are applied to the relay.
Note: When the relay is applied with a single
voltage input (SINGLEV = Y) phase
reversal detection is based on phase
current measurement only.
4.4.8 Speed Switch Tripping
Table 4.22 Speed Switch Tripping Time Delay Setting
When the motor is equipped with a speed switch,
you may wish to provide additional locked rotor
protection using the relay speed switch input.
When the Speed Switch Trip Time Delay is set,
the relay will trip if the speed switch is not closed
SPDSDLY seconds after the motor start begins. If
you wish to use speed switch tripping, connect
the speed switch contacts to relay input IN3 or to
the contact input at the SIMPRO-100-RTD
External RTD Module.
Note: The SIMPRO-100-RTD External RTD
Module updates the state of the RTD
measurements and contact input every
0.5 seconds. To account for this update
delay, you may wish to set a slightly
longer Speed Switch Trip Time Delay
when the speed switch contact is
monitored by the external module.
To disable speed switch tripping, set the Speed
Switch Trip Time Delay equal to OFF.
4.5 RTD-Based
Protection
When you purchase the SIMPRO-100 Relay with
optional RTD inputs, or connect the
SIMPRO-100-RTD External RTD Module, the
relay offers several protection and monitoring
functions whose settings are described below.
4.5.1 RTD Configuration
Settings
Table 4.23 RTD Configuration Settings
The SIMPRO-100 Relay can monitor temperature
using RTD inputs in one of two ways:
• Optional internal RTD inputs
• An SIMPRO-100-RTD Module
When RTDs will not be connected to the relay or
to an external module, set the RTD Input Option
setting equal to NONE. When RTDs will be
connected to internal RTD inputs, set the RTD
Input Option setting equal to INT. When
monitored RTDs will be connected to the inputs of
the external module, set the RTD Input Option
setting equal to EXT.
Note: SIMPRO-100 Relays equipped with
internal RTD inputs may be connected to
monitor the RTD inputs of a
SIMPRO-100-RTD Module. The relay will
monitor only those inputs enabled by the
RTD Input Option setting. It will not
monitor both input sets simultaneously.
The Temperature Preference Setting allows you
to configure the RTD temperature trip and alarm
settings and temperature reporting functions in
your preferred units: degrees Celsius or degrees
Fahrenheit.
Setting
Prompt
Setting Range
Setting Name =
Factory Default
Speed Switch
Trip Time Delay
OFF, 0.50 – 400.00 s SPDSDLY = OFF
Setting Prompt Setting Range
Setting Name =
Factory Default
RTD Input Option INT
a
, EXT, NONE RTDOPT = NONE
Temperature
Preference Setting
C, F TMPREF = F
a
INT is only available in Models SIMPRO-100-R-V or N.
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