DOLD VARIMETER IMD RN 5897/321 Translation Of The Original Instructions

Monitoring Technique
VARIMETER IMD
Insulation monitor
RN 5897/321
RN 5897/321
Product Description
The insulation monitor RN 5897/321 of the VARIMETER IMD family
provides 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 device 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, that
need an extended temperature range. The setting of the parameters and
the switching values is done via Modbus. All measured values, device
statuses and parameters can also be read out via Modbus. All functions
of the device can also be operated via Modbus. The operating status is
indicated user friendly via a multicolour LED. With a sealable transparent
cover the device is protectet against manipulation.
Circuit Diagram
VSG1 L(+) L(-) A1(+)
VSG2
L(+) L(-) 11
U H
PE1 PE2
12
X1 X2
11 12 14 21 22 24 PE1
Connection Terminals
Terminal designation Signal description
A1(+), A2 Auxiliarx voltage AC or DC
L(+), L(-), VSG1, VSG2 Connection for coupling device
PE1, PE2 Connection for protective conductor
Control input
(combined external Test- and Reset-input
X1, X2
with additional Stop of the measuring
function)
11, 12, 14 Alarm signal relay K1(1 changeover contact)
Prewarning signal relay K2 (1 changeover
21, 22, 24
contact)
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
A2
21
14 22 24
PE2
M11956_a
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
• Universal application in non-earthed AC-, DC-, AC/DC networks
up to AC max. 250 V resp. DC max. 300 V
• Connection 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 possible
• Extended operating temperature range of - 40 ... + 70 °C
• 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
• Easy adjustment of response values and setting parameter via Modbus
• 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)
• With galvanic separated Modbus RTU interface
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
• With multicolour status LED to indicate the state of operation.
• 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
• 2 wide voltage input for auxiliary voltage
• Width 52.5 mm
Approvals and Markings
AC/DC
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
12.07.22 en / 604A