Below is a cache of http://www.megalert.com/pdf/datamtr.pdf. It's a snapshot of the page taken as our search engine crawled the Web.
The web site itself may have changed. You can check the current page or check for previous versions at the Internet Archive. Yahoo! is not affiliated with the authors of this page or responsible for its content.
Because Motor Failure is Not an Option.
Unscheduled equipment downtime can ruin your day
and your production schedule. Moisture,
contamination and heat combine to break down
motor winding insulation,
shorten motor life, and
threaten your critical
processes with
catastrophic
motor failure.
Motor Guard
is an automatic insulation resistance
tester that monitors and protects critical-duty motors.
Originally offered in medium voltage designs for
protecting expensive 2400V and 4160V motors,
Motor Guard
is now
available in a cost
effective 480 volt
design. This low
voltage design tests the
integrity of motor
winding insulation
during idle cycles and
triggers alarms to
signal unsafe conditions. Maintenance personnel can
then initiate early corrective action before motor
failure occurs, avoiding costly downtime.
Because Motor Failure is Not an Option.
M O T O R & G E N E R A T O R P R O T E C T I O N
(800) 778-5689
w w w . m e g a l e r t . c o m
The U.S. Navy and the U.S. Coast Guard use
Motor Guard
to protect on-board motors and
generators because in their critical operations
motor failure is not an option. Most oil and gas
platforms in the Gulf of Mexico use Motor Guard
technology to protect their motors and generators
for the same reason. Meg-Alert is proud to
introduce this patented, cost effective, and proven
technology to the industrial market place.
Value
Added
Benefits
Reduced downtime of
critical processes
Reduced maintenance
staff time and cost
Significant safety
improvement
Increased operating
efficiency
Extended motor life
Planned motor
reconditioning vs.
motor rewind
Photo courtesy of Marathon
Electric Manufacturing Corporation.
Model GP500 (800) 778-5689
w w w . m e g a l e r t . c o m
circuit breaker
MOTOR GUARD
start
circuit
(optional)
remote LED
assembly
(optional)
meter
480V
high-voltage compartment
low-voltage compartment
lockout
signal
remote alarm
signals
motor
run
signal
test output
return signal
480 V
three-phase
motor
motor starter
plc/alarm
system
Standard Features: Auto/manual test operation Flashing L.E.D. display with test and fault indication Adjustable alarm/fault setpoint with latching
contacts and manual reset capability Full 500 VDC test voltage Fused input and H.V. test leads Compact, lightweight enclosure with terminal guard
and dust cover DIN rail mounting bracket Shock and vibration resistant construction Five year limited warranty Remote L.E.D. display and nameplate (optional) 1% or 2% switchboard meg ohm meter M/MU
models only
Operation:
Motor Guard
applies a current limited, fixed dc
voltage to the motor windings during idle periods. A
solid state comparator circuit monitors measured
leakage current to ground. An adjustable setpoint,
factory preset to customer specifications, can be
programmed to signal an alarm and lockout the
equipment from operating if the set point is
exceeded. The manual reset feature enables a return
to operational status only after the fault condition has
been corrected. Motor Guard will not impair
normal operation of equipment being monitored.
In addition to a wide variety of standard, in-stock
systems, our engineers will work with you on custom
applications. Call the factory for more details.
8766 Frank Drive Minocqua, Wisconsin 54548 Fax: (715) 356-6099
Motor Guard GP500 Specifications:
Input Power:
115-125 VAC 50/60 Hz @.05 A max.
Test Voltage:
500 VDC @ 200 uA max.
Alarm Contacts:
5A @ 240 VAC or 28 VDC
Lockout Contacts:
5A @ 240 VAC or 28 VDC
L.E.D. Display:
Test on: green (flash); Fault: red (flash)
Control Accuracy:
2% overall
Ambient Temp.:
14°F to 140°F
Dimensions (Inches):
H 2.75 x W 2.25 x D 4.50
Weight:
1 lb.
Assembly:
Meets UL 508 specifications
GP 500 9 M
Meg-Alert General
Product Family
Tester Voltage
500 = 500 VDC
1000 = 1000 VDC
2500 = 2500 VDC
5000 = 5000 VDC
No # = Single Motor or Generator Insulation Tester
2 = Automatic 2 Motor or Generator Insulation Tester
4 = Automatic 4 Motor or Generator Insulation Tester
6 = Automatic 6 Motor or Generator Insulation Tester
8 = Automatic 8 Motor Insulation Tester
9 = Automatic 9 Motor Insulation Tester
No Letter = Motor Guard Go/No Go Tester
M = Motor Guard Motor Insulation Tester
G = Gen Guard Generator Insulation Tester
BT = Bench Tester
D/C = DC Motor Insulation Tester
MU = Special Model for Utilities
Model # Code:
Also Available from Meg-Alert:
Gen Guard is patented technology for protecting
low and medium voltage generators.
USCG