Hoffman Controls Model 610 Series User Manual

If one of the above conditions occurs, the Model 610 operates a
TRIP
relay to disconnect power from the load. An
ALARM
relay is also provided
that can be used to alert operators of a lockout condition. The number of
automatic trip resets allowed before a lockout occurs is operator selectable.
The
automatic
trip reset time is also selectable.
When protecting
3 phase loads, t
When protecting 3 phase loads, tWhen protecting
he Model 610 detects phase
The class II Model 610 Digital Current Monitor offers the latest
technology for providing positive and accurate over current motor
(load) protection for single, and 3 phase motors, drawing between 5
and 200 amps. The Model 610 also can monitor up to two thermistor
temperature sensors to detect abnormally high and/or low compressor
operating temperatures.
Motor protection is accomplished by monitoring the operating
motor current, in each phase of the load, using current transformers.
For both single and 3 phase loads, the control digitally processes the
sampled current and calculates the excess energy being absorbed by
the motor due to current flow above the operator selected trip level.
If the current is above the selected trip level, the controller calculates
the excess power and integrates to calculate excess energy. When the
excess energy rises to a level equivalent to locked rotor for 2 seconds,
a current trip will occur. If the current drops below the trip level prior
to a trip, the controller will reset the integration to zero. This prevents
false-alarm trips. Fail-safe operation is provided by protecting the load
from excessive current or abnormal temperatures in one or more of
the following overload conditions:
Hoffma
n
|
Controls
Complete
Installation & Opera-
Complete Installation & Opera- Complete
ting Instructions for Model
702-0610-325
Model 610
Digital
Current Monitor
1
Introduction
imbalance
and can also verify correct phase rotation during each
load's startup.
Setting the current trip level at 8% above the nominal FLA of the
motor will indirectly provide both low and high voltage protection.
Setting the current trip level at other percentage levels above FLA will
directly prot
ect the motor.
The optional, customer supplied, Omega 10K thermistor tempera-
ture sensors can be used to monitor compressor exhaust temperature
and crankcase oil temperature. Omega offers a wide range of therm-
istor sensors that are readily available. The trip temperature values are
operator selectable. The Exhaust high temperature value can be set
between
80
°
F
and
300
°
F
or between
100 Ohms
and
2
0K Ohms
.
The Oil temperature trip values can be set for high, low or both high
and low trip temperatures between
20
°
F
and
200
°
F
or between
200
Ohms
and
2
0K Ohms
. Consult factory for different temperature
ranges.
This micro controller based Model 610 Digital Current Monitor is
available in four different models:
1)
Model 610-1PH
Provides single phase motor protection
2)
Model 610-3PH
Provides three phase or single phase motor
protection
3)
Model 610-1PH(MOD)
Provides single phase motor protec
tion and Modbus RTU remote
operation.
4)
Model 610
-3PH(M
OD
)
P
rovides
three phase
or single phase
motor
protection
and
Modbus
RTU
remote
operation
.
All four Model 610 Digital Current Monitor models can be
operated locally using the four push buttons and
LCD
screen. The
two Modbus models [ending in
(MOD)]
can also be operated
remotely using a Modbus RTU master controller.
All Model 610 Monitors operate on 24 VAC (2.5 VA).
The Model 610 Current Monitor consists of
a Kydex covered
PCB on standoffs, with a 32 character LCD and four push
buttons. The LCD is used 1)
to
display operational information
and 2) for setting parameters and numerical values via a menu
system. The menu system allows the operator to:
1)
Reset a trip
2)
Select the number of monitored current phases.
3)
Select the over current trip level.
CAUTION:
Failure to read, understand and follow the accompanying
instructions and diagrams, prior to completing the instal-
lation, may result in permanent damage to the motor.
�
Electrical Overcurrent Mechanical Overload
Single & 3 Phase Wear
Phase Imbalance Binding
Low/High Voltage Friction
Locked Rotor Stall
Power Factor Torque
Compressor Temperature Abnormalities
High Exhaust Temperature
High and/or Low Oil Temperature
Description
IMPORTANT:
When using the Model 610 Digital Current
Monitor, select
a transformer to meet the requirements of all the 24 VAC
components being used.
�
Single & 3 Phase Wear
Phase Imbalance Binding
Low/High Voltage Friction
Locked Rotor Stall
Power Factor Torque

Hoffman Controls Model 610 Series Specifications

General

Brand	Hoffman Controls
Model	Model 610 Series
Category	Measuring Instruments
Language	English