Function Diagram; Approvals And Markings; Applications; Function - DOLD VARIMETER EX Mode D'emploi

Monitoring Technique
VARIMETER EX
Thermistor Motor Protection Relay
MK 9163N ATEX

Function Diagram

U H
A1/A2
~
R
3,8k
1,5k
P1/P2
20
Test/Reset
button
X1/X2
Test Test Overtemperature/
broken wire detection
11-14
11-12
11-14
11-12
11-14
11-12
All technical data in this list relate to the state at the moment of edition. We reserve the right for
technical improvements and changes at any time.
voltage failure/ sensor Test/
Reset short circuit Reset
M11838
Your advantages
• Reliable temperature monitoring of motors
• Rapid fault location
Features
• According to EN 60947-5-1, EN 60947-8, EN 60079-14, EN 61508,
EN 50495, EN 13849
• Monitioring of
- overtemperature
- broken wire detection in sensor circuit
- short circuit detection in sensor circuit
• 1 input for 1 to 6 PTC-resistors
• De-energized on trip
• LED-indicator for
- auxiliary supply
- state of contact
• Output with 2 changeover contacts
• As option with manual reset, internal reset button and external
remote reset X1/X2
• Wire connection: also 2 x 1.5 mm
2 x 2.5 mm solid DIN 46 228-1/-2/-3/-4
2
• As option with pluggable terminal blocks for easy exchange
of devices
- with screw terminals
- or with cage clamp terminals
• Width 22.5 mm

Approvals and Markings

1)
A025518
For devices with ATEX-approval
1)
Directive
2014/34/EU
EU-Test certificate no
. PTB 03 ATEX 3117
II (2) G [Ex e] [Ex d] [Ex px] [Ex n]
Marking
II (2) D [Ex tb] [Ex tc]
2) Approval not for all variants; on request

Applications

• To protect against thermal overload of motors caused by high switching
frequency, havy duty starting, phase failure on one phase, bad cooling,
high ambient temperature
• Temperature monitoring of bearings, transmissions, oil and cooling liquids.
Devices with ATEX-approval:
Temperature monitoring of explosion protected Motors by „extended safety"
EX e EN 60079-7, „pressure proof enclosure" EX d EN 60079-1 or „overpres-
sure enclosure" Ex px in gas containing atmosphere as well as „protection
by enclosures" Ex t EN 60079-31 in dust containing atmosphere. The
thermistor Motor protection relay protects Standard and Explosion proof
Motor against overheating due to overload accoding to EN 60079-14
and EN 60079-0.

Function

If one of the sensors in the measuring circuit reaches the response tempe-
rature (or broken wire is detected), the device indicates failure. This failure
is stored in the device with manual reset, even if the temperature goes
back to normal. The unit can be reset by pressing the Test/Reset button,
by bridging X1/X2 for a short moment or by disconnecting the auxiliary
supply for a short time.
Test/Reset button:
Besides the reset function this button provides in normal operation a test
facility. The unit indicates fault as long as the button is activated (see also
under "Variants").
13
stranded ferruled, or
2
2)
MK 9163N ATEX / 02.05.19 en / 098A