23644_EDEBDA0258-2918-1_EN
Operating instructions –
assembly manual
Your partner for
network analysis
Low voltage
current transformers
-
foldable
cable type current transformer
multict KBR
System I English
23644_EDEBDA0258-2918-1_EN
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Low voltage current transformers, multict KBR
Dear customer
Thank you for choosing a KBR product.
To familiarize yourself with the operation and con guration of the device, we recommend
that you read this manual carefully. This way, you will be able to use the entire range of
functions that this high-quality product has to o er.
The individual chapters explain the technical details of the device and show how to
properly install and start it up to prevent damage.
This user manual is included in the scope of delivery of the device and must be accessible
to the user at all times (e.g. in the switchgear cabinet). Even if the device is resold to third
parties, the manual remains an inherent part of the device.
Although the utmost care has been taken in putting together this user manual, errors
may still occur. We would be very grateful if you could notify us of any errors or unclear
descriptions you may notice. The form included in the appendix to this manual can be
used to send us corrections or suggested improvements.
Yours sincerely,
KBR GmbH Schwabach
1. Safety notes .................................................3
2. Function Description ...............................4
3. Warnings ......................................................5
4. Installation ...................................................6
4.1. Measuring current inputs .......................6
4.1. Installation instructions ..........................7
5. Maintenance and inspection ................7
6. Error Recovery ............................................8
7. Technical data
(for exact data, see rating plate) ..........8
7.1. Technical data (general) .......................... 8
7.2. Technical data type-related ................. 10
8. Product information .............................. 11
Contents
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Low voltage current transformers, multict KBR
1. Safety notes
Before installing, commissioning or operating the device,
please read these instructions fully and carefully.
CAUTION!
The following points should be noted:
The applicable laws, standards and regulations.
The latest technology at the time of installation.
The technological rules.
The operating instructions.
The fact that operating instructions can implement general regulations only
and that these regulations must be taken into account.
Check the device carefully before putting it into operation for
possible damage in transit. In the event of mechanical damage,
the device must not be put into operation.
The devices described are designed to be installed by quali ed electricians and
may be installed in electrical operating rooms or enclosed housings only.
Any other use or failure to comply with these
instructions for use will void the warranty/guarantee.
The devices may be tted in dry indoor areas only.
Do not mount on or against highly ammable materials.
Operating the device at a nominal current above that speci ed on the rating
plate can cause the current transformer to overheat, causing burns.
Disclaimer
The contents of this manual have been checked to concur with the described hardware
and software components. Nonetheless, deviations cannot be ruled out, and the manufacturer cannot guarantee 100% conformity. The speci cations given in this manual are
checked on a regular basis; necessary corrections will be included in the next revision.
We appreciate your corrections and comments.
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Low voltage current transformers, multict KBR
Product liability
You have purchased a high-quality product.
Only components of the highest quality and maximum reliability are used.
Each device is subject to long-term testing before it is delivered.
For details on product liability, please refer to our general terms and conditions for electronic equipment.
The assured device properties only apply if
the device has been operated in accordance with its intended use!
Disposal
Devices that are faulty, obsolete or no longer used must be properly disposed of.
If required, we will dispose of the devices for you.
2. Function Description
Current transformers in the KBR series are inductive, according to the transformer principle
of working, single-ended current transformers. They are used to adapt the primary measured value to the input nominal values of the connected measuring instruments.
Based on the applied measuring principle, these current transformers are suitable for use
in AC networks only.
The KBR series is suitable only for assembly on insulated primary conductors.
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Low voltage current transformers, multict KBR
3. Warnings
CAUTION!
Dangerous electrical voltage can cause electric shock and burns.
Make sure that the information on the rated plate and in the “Technical Data”
under point7 correspond to the system operating parameters.
Switch o the system before starting installation work!
CAUTION!
In a non-loaded (open) secondary circuit of the current transformer, high
voltages are induced at the secondary terminals. The occurrent voltages are
a hazard to persons and risk a ecting the reliability of the current transformer.
An „open operation,“ i.e. operating the current transformer without secondary
wiring, must be avoided under all circumstances.
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Low voltage current transformers, multict KBR
4. Installation
Ensure a safe working environment during tting, maintenance and installation work.
Interrupt the power supply of the primary conductor and secure it against unintentional restarting.
Open the current transformer and fasten it to the primary conductor with the help of
the xing clips supplied in the delivery. P1 points to the power source, P2 to the load.
The arrow on the rating plate indicates the direction of energy ow.
Caution: Do not close the current transformer yet, as high voltages can occur at the
secondary terminals!
Caution: Ensure the cut surfaces of the split core are clean. Avoid hand contact (sweat)!
Connect the secondary cables in the current transformer to the measuring device (am-
meter or meter etc.). Observe the operating instructions for the measuring device.
Check whether the current transformer is tted properly and the secondary wires are
connected properly.
Close the current transformer – press together until the lock engages.
I f necessary, switch on the power supply of the primary conductor again.
4.1. Measuring current inputs
A
k-S
1
l-S
2
K-P
1
L
N
L-P
2
R
L
brown cable: S1
blue cable: S2
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Low voltage current transformers, multict KBR
NOTE
Types KBR 18S, KBR 18L and KBR 28 can be mounted with snap-on attachments
available as an option onto 35mm DIN pro le rail (item no, see accessories).
4.1. Installation instructions
5. Maintenance and inspection
Check whether the secondary cables are rmly connected to the measuring device.
Check whether the current transformer is closed properly.
Remove coarse dirt from the current transformer housing. Contact with moisture,
especially with the core, must be avoided under all circumstances.
Using the xing clips
Sealing option with types KBR 18S, KBR 18L, KBR 28,
KBR 42 and KBR 42L
With types KBR 42 and KBR 42L, the lower core half can be
removed for easier assembly.
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Low voltage current transformers, multict KBR
6. Error Recovery
e.g. unexpected or wrong values, reverse performance
Check the settings of the measuring device according to its instruction manual.
C heck whether the current transformer is mounted on the intended conductor in the
direction of the energy ow.
Check whether the current transformer is closed properly.
Check the power requirements of the cables and measuring devices connected to the
current transformer. This must not exceed the rated power of the current transformer.
(See rating plate.)
Should the aforementioned points not solve the problem: Check for dust or other
contamination between both parts of the core. If so, gently clean the surfaces with a
lint-free cloth.
Avoid hand contact (sweat)!
7. Technical data (for exact data, see rating plate)
7.1. Technical data (general)
Input
Primary rated current I
pr
: see table in 7.2.
Thermal rated uninterrupted current I
cth
: 1.2 x Ipr KBR 18, 32, 44
1.0 x I
pr
other types
Thermal rated short-time current I
th
: 60 x Ipr/1s
Rated surge current l
dyn
: 2.5 x I
th
Rated frequency fR: 50 … 60 Hz
Output
Secondary rated current I
sr
: see table in 7.2.
Optional voltage output
KBR 18, KBR 32, KBR 44:
0…0.333V AC
External load min.100 kΩ
Accuracy class: 0.5 … 3
Rated power S
r
: 0.3 … 5 VA
Overcurrent limit factor FS: FS5 or FS10
Continuation, right
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Low voltage current transformers, multict KBR
Operating conditions
Ambient temperature: -5…+40°C KBR 18S
-5…+50°C other types
Storage temperature: -25 … +70°C
Relative humidity (excl. condensation): 5 … 95%
Operating height: up to 2,000 m
Insulation properties
Comment: Only for insulated
primary conductors
Rated insulation level Um
(in accordance with IEC 61010-1
under the following conditions:
- Overvoltage category III
- Contamination grade 2
- Heterogeneous electrical eld): 0.72/3/- kV
Insulation class: E
Safety
Protection type: IP20
Housing material KBR 18S, KBR 18L
KBR 28, KBR 42, KBR 42L PA66 + PA6
UL-housing classi cation of the following types:
PA66 + PA6
UL94-V0
Housing material KBR 18; KBR 32; KBR 44: PA6
UL housing classi cation of the following types: none
Connection
Conductor feed-through, primary conductor: see table in 7.2.
Secondary cables: see table in 7.2.
Standards met
The latest edition of the speci ed documents
including all modi cations apply.
EN 61869-1
EN 61869-2
IEC 61010-1
Accessories
Snap-on attachment for
DIN pro le rail
KBR 18S
Item no. 23478
KBR 18L, KBR 28
Item no. 23479
or
I
t
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Low voltage current transformers, multict KBR
7.2. Technical data type-related
KBR
18S
KBR
18
KBR
18L
KBR
28
KBR
32
KBR
42
KBR
42L
KBR
44
primary
rated current [A]
60..250 50..250 100..250 200..500 100..600 250..1000 250..1000 250..1000
secondary
rated current [A]
1 1 1 or 5 1 or 5 1 or 5 1 or 5 1 or 5 1 or 5
Suitable
for cable diameter
max. mm
18.5 18.5 18.4 27.9 32.5 42.4 42.4 44.0
Transformer
bridge mm
36.0 41.6 49.0 49.0 59.2 67.0 67.0 72.2
Transformer
height mm
51.1 64.5 68.8 68.2 96.4 96.0 139.0 120.6
Secondary
cables 1A
1)
2.5 m
0.5 mm²
2.5 m
0.75 mm²
2.5 m
0.5 mm²
2.5 m
0.5 mm²
2.5 m
0.75 mm²
2.5 m
0.5 mm²
2.5 m
0.5 mm²
2.5 m
0.75 mm²
Secondary
cables 5A
1)
––– –––
0.5 m
1.5 mm²
0.5 m
1.5 mm²
0.5 m
1.5 mm²
0.5 m
1.5 mm²
0.5 m
1.5 mm²
0.5 m
1.5 mm²
1) Standard lengths, other lengths available on request
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Low voltage current transformers, multict KBR
8. Product information
Our customers trust the world-renowned quality of our products.
Current transformers are produced with closed and split cores. These undergo multiple
tests during the production process to ensure all quality requirements.
The split design of the KBR product group means that these converters are more sensitive
to external in uences than current transformers with a closed core.
In addition to environmental conditions such as temperature and humidity, as well as
mechanical stress, other factors such as soiling, corrosion and damage to the cut surfaces
can a ect the accuracy of the transducer.
KBR GmbH has no in uence on these factors.
Any measuring accuracy deviations caused by these in uences, especially in the longterm measuring behavior, cannot be completely ruled out.
However, the total errors occurring as a consequence of the above in uences is generally
always within the applicable tra c error limits.
(The applicable tra c error limits cannot exceed twice the standard error value.)
23644_EDEBDA0258-2918-1_EN
Am Kiefernschlag 7
D-91126 Schwabach
T +49 (0) 9122 6373 - 0
F +49 (0) 9122 6373 - 83
E info @ kbr.de
www.kbr.de
KBR Kompensationsanlagenbau GmbH
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