DOLD VARIMETER IMD RN 5893 Instructions Manual

Monitoring Technique
VARIMETER IMD
Insulation monitor
RN 5893
RN 5893
Product Description
The insulation monitor RN 5893 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. 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. The RN 5893 has an
additonal Modbus RTU-interface. All measured values, device states
and parameters can be read out, set and parameterized. All functions
available on the device can also be operated via Modbus.
Function Diagram
By default:
Indicator rel. K1 (11, 12, 14) = Insulation fault-alarm + device fault and
Indicator rel. K2 (21, 22, 24) = Insulation fault-pre-alarm + device fault:
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 device
RP 5898
t
t
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
• 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
• With connection facility of an external coupling device
RP 5898 for voltages up to AC 690 V / DC 1000 V
• RN 5893: Very fast reaction time ≤ 1 s
RN 5893/010: Reaction time < 10 s
• Optimised insulation resistance monitoring also during
mains voltage variation
• Easy adjustment of response values and setting parameter via
rotational switch and menu display or via Modbus RTU-interface
• RN 5893: Suitable for leakage capacitances up to 5 µF
RN 58930/010: Suitable for 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)
• 2 parameterizable changeover contacts (for insulation fault pre-alarm,
insulation fault-alarm, insulation fault-alarm on DC+/DC- or
device fault) each galvanic separated
• With galvanic separated Modbus RTU interface
Features
• Insulation monitoring according to IEC/EN 61557-8
• 2 separate adjustable response thresholds
(using e.g. for pre-alarm and alarm)
• Setting value pre-alarm: 1 kΩ ... 500 kΩ
• Setting value alarm: 1 kΩ ... 500 kΩ
• Energized or de-energized on trip can be selected for indicator relay
• Display for indication of measured value, device parameters and
device status
• Manual device self-test (automatic 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
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
17.04.24 en / 869A