Flex current clamps A 1501, A 1502 and A 1503
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1 Introduction
Flexible Current Clamps A 1501, A 1502 and A 1503 are based on Rogowski coil
principle and can measure alternating currents on low and medium power installations.
Unlike standard current transformers, this type of current sensor does not use magnetic
cores. The transformation principle is based on an air core. It presents virtually no load
to the system under test, has a low phase shift and excellent frequency response.
They consist of current sensor of different lengths and active electronic for multiple
current range, as shown on table below. User should select sensor length according to
the current conductor diameter where measurements will be performed.
Model
Flexible
sensor
length
Maximal
conductor
diameter
Nominal
current range
Effective
measurement range
A 1501
25 cm / 10 in
7 cm / 2,7 in
30 A
300 A
3000A
3
A … 45 A
15
A … 450 A
80
A … 4500 A
A 1502
48 cm / 19 in
14 cm / 5,5 in
A 1503
90 cm / 35 in
27 cm / 10,6 in
60 A
600 A
6000A
6 A
… 90 A
30 A
… 900 A
160 A
… 9000 A
Embedded electronic module provides automatic clamp recognition (for Metrel
instruments) and current range switching. Module is powered directly from attached
instrument, so clamp does not require additional power supply. The flexible sensor
permits measurements on conductors where standard clamp-on current transformers
cannot be used. It is particularly useful for installation in tight spaces, or around breaker
panels, cable bundles, wide or large bus bars and irregular shapes.
Additionally, clamps can
’t be damaged by overloads; they are insensitive to DC current,
and measure only the AC component of the current.
2 Main features
Range setup from the instrument, no additional range setup needed
Power supply for electronic module is assured from the instrument
Waterproof sensor
Minimum angle shift to accomplish accurate power measurements
High accuracy
Total rejection of DC component
Friendly-use of the closing-opening system of the current sensor (even if wearing
gloves) due to its highly ergonomic design
Very light, flexible and fully adaptable to busbar trunking system and insulated
cables
Strengthened security, regardless the working environment industrial or services
