November 30, 2017 --- HARTING is introducing the sensors of the HCME series for the first time at the SPS IPC Drives Fair in Nuremberg (28 to 30 November 2017; Hall 10 / Stand 140).
With HCME, HARTING has developed a series of devices that work according to the principle of direct imaging - open loop - and use rectangular cores. The devices achieve a precision which in many installations can only be obtained with the accuracy offered by compensating current transformers (+ - 0.5%). The rectangular shape saves space for the sensors. They also are designed to speed up installation and assembly since they can be mounted on a power rail.
Current sensors offer asolution when monitoring frequency inverters. What has already proven itself over many years in power transmission and conversion in the energy sector can also bear fruit in the area of automation and mechanical engineering.
There are parallels: to supply operating equipment with power, mechanical engineering also increasingly relies on power rails, which are often made of aluminium and which can be monitored using sensors. With the HCME series, HARTING has optimised the open-loop sensor for the installation situation on busbars. The result is devices with dimensions 6 cm high and 14.5 cm wide. The feedthroughs for the rails are up to 64 mm wide and 21 mm high (special formats possible).
In addition, mounting lugs are let into the housing, by means of which the sensors can be applied directly to the current rail with two screws.
The temperature range from -40° C to + 85° C permits use even under extreme environmental conditions.The sensors are designed for use in frequency inverters and in the supply of power to high-performance loads. In addition, the HCME current transformers are protected against interference, e.g. such as that caused by the magnetic fields of external current carrying lines.
HCME stands for HARTING Current Measurement Eco. The series includes 7 measuring transducers for currents up to 5500 amperes. They measure direct and alternating currents between 0 and 50 kHz. This means they have also caught up with compensating current transformers, for which the bandwidth ranges from 0-100 kHz.
