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Monitoring Technique
VARIMETER IMD
Insulation monitor
RN 5897/300
Product Description
The insulation monitor RN 5897/300 of the VARIMETER IMD family is
a solution for optimal insulation monitoring of modern IT systems. The
device can be used in the most flexible way for AC, DC and AC/DC
systems. The adjustment of the setting values is simple and user friendly
done on 3 rotary switches on the front of the device. Via multicolor LED the
device status is indicated easy to read. With a sealable transparent cover
the device is protectet against manipulation.
Circuit Diagram
L(+)
L(-)
A1(+)
L(+) L(-)
11
U H
PE1
PE2
12
X1 X2
11 12 14 21 22 24
PE1
Connection Terminals
Terminal designation
A1(+), A2
L(+), L(-)
PE1, PE2
X1, X2
11, 12, 14
21, 22, 24
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.
A2
21
14
22
24
PE2
M11454_a
Signal description
Auxiliarx voltage AC or DC
Connection for measuring ciruit
Connection for protective conductor
Control input (combined external
Test- and Reset-input)
Alarm signal relay K1
(1 changeover contact)
Prewarning signal relay K2
(1 changeover contact)
Translation
of the original instructions
Your Advantages
• For mobile generator sets according to DIN VDE 0100-551
• Preventive fire and system protection
• Detection of symmetric and asymmetric insulation faults
• Universal application in non-earthed AC, DC, AC/DC networks
up to max. 300 V
• Easy adjustment of response values and setting parameter via
rotational switch
• Suitable for large leakage capacitances up to 30 µF
• Monitoring also with voltage-free mains
• Measuring circuit L(+)/L(-) with broken wire detection (can be switched off)
• Protective conductor PE1/PE2 with broken wire detection
(can't be switched off)
• No additional coupling device required
Features
• Insulation monitoring according to IEC/EN 61557-8
• 2 separate adjustable response thresholds
(using e.g. for pre-Alarm and Alarm)
• Setting range of 1st response value (Pre-Alarm): 20 kΩ ... 1 MΩ
• Setting range of 2nd response value (Alarm): 10 kΩ ... 250 kΩ
• 2 changeover contacts für insulation failures-Pre-Alarm and -Alarm
• Energized or de-energized on trip can be selected for indicator relay
• LED for status indication
• Automatic and manual device self-test
• Alarm storage selectable
• Protection against manipulation by sealable transparent cover
• External control input for combined Test-/Reset-button
• 3 wide voltage input for auxiliary voltage
• Width 52.5 mm
Approvals and Markings
Canada / USA
Applications
Insulation monitoring of:
• Non-earthed AC, DC, AC/DC networks
• UPS systems
• Networks with frequency inverters
• Battery networks
• Networks with direct current drives
• Hybrid and battery-powered vehicles
• Mobile generator sets
1
AC/DC
10.11.23 en / 800A
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Table of Contents
Related Manuals for DOLD VARIMETER IMD RN 5897/300
Summary of Contents for DOLD VARIMETER IMD RN 5897/300
- Page 1 Monitoring Technique VARIMETER IMD Translation Insulation monitor of the original instructions RN 5897/300 Your Advantages • For mobile generator sets according to DIN VDE 0100-551 • Preventive fire and system protection • Detection of symmetric and asymmetric insulation faults • Universal application in non-earthed AC, DC, AC/DC networks up to max.
-
Page 2: Measuring Circuit
Function Device test functions The device is supplied with DC auxiliary voltage via terminals A1(+) / A2. Switching on the auxiliary voltage (Power-On) is followed by an internal Principally, 2 different test functions are implemented: The "self-test" and self-test for 12 sec (see „Device test functions“). The test process is visible the "expanded test": in the status LED. -
Page 3: Function Diagram
Function Function Diagram Behaviour with internal device faults If internal device faults were detected during the test function, the LED flashes continuously red. The indicator relays K1 and K2 switch to the alarm state. Behavior on faulty connection Earth fault When detecting broken wire on terminals L(+)/L(-), the measurement is disabled. - Page 4 Indicators Error Indication Connection Auxiliary Flash code measuring ciruit voltage Failure cause Failure recovery Status-LED Check Broken wire detection measuring circuit on L(+)/L(-). L(+) and L (-) Check Broken wire detection protective earth on PE1/PE2. connections PE1 and PE2 Press test button again or restart the unit by interrupting the Internal failure continously...
- Page 5 Technical Data Technical Data Measuring ciruit L(+) / L(-) to PE1 / PE2 General Data Nominal voltage U Operating mode: AC / DC 0 ... 230 V Continuous operation Max. voltage range U Temperature range AC / DC 0 ... 300 V Frequency range: DC or 40 ...
-
Page 6: Switching Capacity
Classification to DIN EN 50155 Ordering Example for variants Vibration and RN 5897 .12 /300 /61 AC/DC 24 … 60 V 10 kΩ - 250 kΩ 20 kΩ - 1 MΩ shock resistance: Category 1, Class B IEC/EN 61373 Service temperature classes: OT1, OT2 compliant Setting range Pre-warning Protective coating of the PCB: No Setting range alarm... -
Page 7: Connection Examples
Connection Examples Ungrounded mains Single phase mains, isolated from earth 3N AC 400V/230V 40...1000Hz AC 0...300V 40...1000Hz Setting of type of network: Setting of type of network: 3N AC L(+) L(-) A1(+) L(+) L(-) A1(+) RN5897/300 RN5897/300 External combined External combined Test/Reset button Test/Reset button M11627... - Page 8 Characteristics M11611 E. Dold & Söhne GmbH & Co. KG • D-78120 Furtwangen • Bregstraße 18 • Phone +49 7723 654-0 • Fax +49 7723 654356 dold-relays@dold.com • www.dold.com 10.11.23 en / 800A...
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