DOLD VARIMETER IMD RN 5897/020 Monitoring Technique

Monitoring Technique
VARIMETER IMD
Insulation monitor
RN 5897/020
RN 5897/020
Product Description
The insulation monitor RN 5897/020 of the VARIMETER IMD family provi-
des best and up to date insulation monitoring of modern IT systems in an
optimum and state of the art way fulfilling the relevant standards. The de-
vice can be used in the most flexible way for AC, DC and AC/DC systems.
Mains areas of applications are non-earthed DC charging stations for
electric vehicles with mains voltages up to DC 1000 V. The adjustment of
the setting values is simple and user friendly done on 2 rotary switches on
the front of the device. Via display and LEDs the measured value, device
parameters and device status are indicated easy to read. With a sealable
transparent cover the device is protectet against manipulation.
Function Diagram
U H
R
E
Earth fault
R
pA
R
A
Hysteresis function
21-24
Open circuit operation
21-22
21-24
De-energized on trip
21-22
11-14
Open circuit operation
11-12
11-14
De-energized on trip
11-12
Manual reset
Reset
21-24
Open circuit operation
21-22
21-24
De-energized on trip
21-22
11-14
Open circuit operation
11-12
11-14
De-energized on trip
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.
Coupling devices
RL 5898 RP 5898
M11593
Translation
of the original instructions
Your Advantages
• Suitable for DC charging stations for electric vehicles acc. to
IEC/EN 61851-23:2014/AC:2016-06
• Insulation monitoring according to IEC/EN 61557-8
• With connection facility of an external coupling device RL 5898
for voltages up to AC 400 V / DC 500 V or
RP 5898 for voltages up to AC 690 V / DC 1000 V
• Very fast reaction time ≤ 1 s
• Optimised insulation resistance monitoring also during
mains voltage variation
• Self-test every full operating hours
• Preventive fire and system protection
• Detection of symmetric and asymmetric insulation faults
• Quick fault localisation through selective earth fault detection to L+
and L-
• Universal application in non-earthed AC, DC, AC/DC networks
up to AC max. 250 V or DC max. 300 V
• Easy adjustment of response values and setting parameter via
rotational switch and menu display
• Suitable for large leakage capacitances up to 5 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)
Features
• 2 separate adjustable response thresholds
(using e.g. for pre-alarm and Alarm)
• Setting range of 1st response value (Pre-alarm): 20 kΩ ... 500 kΩ
• Setting range of 2nd response value (alarm): 1 kΩ ... 100 kΩ
• 1 changeover contacts each for insulation failures-Pre-alarm and -alarm
• Energized or de-energized on trip can be selected for indicator relay
• Display for indication of measured value, device parameters and
device status
• Automatic and manual device self-test
• Alarm storage selectable
• Protection against manipulation by sealable transparent cover
• External control input for combined test- / reset-button
with additional Stop of the measuring function
t
• 3 wide voltage input for auxiliary voltage
• Width 52.5 mm
Approvals and Markings
t
Canada / USA
Applications
Insulation monitoring of:
• Non-earthed AC, DC, AC/DC networks
• DC charging stations for electric vehicles
• UPS systems
• Networks with frequency inverters
• Battery networks
• Networks with direct current drives
• Hybrid and battery-powered vehicles
• Mobile generator sets
1
AC/DC
RN 5897 only
1)
12.07.21 en / 423A