Current transformers by KRIWAN

In electrical engineering, the accurate measurement of currents is of crucial importance. Our current transformer switching relay provides precise and reliable measurements, delivering the necessary data for effective control and monitoring of your systems. KRIWAN relies on innovative technologies to establish the highest quality standards. With decades of experience in the industry, KRIWAN is a leader in the development and production of high-quality current measurement solutions.

INT185 Current transformer relay

The INT185 current transformer relay is used for current measurement of machines and equipment (e.g. motors of pumps). It is connected to the KRIWAN protective relays that have a current transformer input. The evaluation takes place in the KRIWAN protection relays. The small dimensions facilitate installation in the control cabinet. The current transformer switching relay is available in different versions, e.g. with measuring range up to 100A or up to 250A and with stranded wires with ferrules or with screw terminals.

Article number	Designation
02D186	INT185 Current transformer; AC 50/60 Hz 3-100 A
02D187	INT185 Current transformer; AC 20-100 Hz 5-100 A
02D188	INT185 Current transformer; AC 20-100 Hz 12,5-250 A

Product information

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The current transformer relay is connected to the current transformer input of the KRIWAN protective relays. The evaluation takes place in the KRIWAN protective relays. The current is measured single-phase by means of the current transformer. The phase of the motor is fed through the opening of the current transformer, and the current transformer acts as a feed-through transformer. For three-phase motors, the motor is assumed to be symmetrical. The current transformers differ in measuring range, frequency converter suitability and connection type. The differences are listed in the technical data table.

The following features distinguish the current transformer switching relay:

Single-phase current measurement for motors of machines and systems (e.g. pumps)
Connection to the current transformer input of the KRIWAN protection relays and evaluation in the KRIWAN protection relays
Can be snapped onto 35mm standard rail
Frequency converter suitability

	02D186	02D187	02D188
Measuring range	AC 50/60Hz 3-100A	AC 20-100Hz 5-100A	AC 20-100Hz 12,5-250A
Frequency converter suitable	No	Yes, at clock frequency 2-16 kHz	Yes, at clock frequency 2-16 kHz
Accuracy	±1% at a load of 33Ω and 20°C	Amplitude ±1% of MW, phase ±1° at a load of 75 Ω	Amplitude ±1% of MW, phase ±1° at a load of 75 Ω
Transmission ratio	1:2500	1:2500	1:6250
Permissible ambient temperature T_a	-30°C ≤ Ta ≤ +70°C	-30°C ≤ Ta ≤ +70°C	-30°C ≤ Ta ≤ +70°C
Permissible humidity	5-95% r. F.	0-95% r. F.	0-95% r. F.
Connection type	Stranded wires with ferrules	Stranded wires with ferrules	Screw terminals
Housing material	PA glass fiber reinforced	PA glass fiber reinforced	PC+ABS
Mounting	Can be snapped onto 35mm standard rail according to EN 60715 or screw mounting	Can be snapped onto 35mm standard rail according to EN 60715	Can be snapped onto 35 mm standard rail according to EN60715
Dimensions	See data sheet	See brief instructions	See brief instructions
Weight	150 g	150 g	250 g
Test basis	EN 61558-1 Overvoltage category II Pollution degree 2	EN 61558-1 Overvoltage category II Pollution degree 2	EN61869-6: 2016 EN61326-1: 2013

Technical data sheet

Brief instructions

Certificates

The most frequently asked questions about our current transformer INT185

Which variants of current transformers exist?

There are three variants of current transformers (ring-type transformers).
02D186 with measuring range 50/60 Hz, 3-100 A, 0.3 m connection cable.
02D187 with measuring range 20-100 Hz, 5-100 A, 1.0 m connection cable.
02D188 with measuring range 20-100 Hz, 12.5-250 A, with connection terminals.
All current transformers are suitable for mounting on the 35 mm standard rail according to EN60715.

What distinguishes KRIWAN current transformers from standard solutions available on the market?

All KRIWAN current transformers have a larger transformer ratio compared to standard market solutions and are matched to KRIWAN products.

What is the current transformer used for?

The current transformers are required for current measurement and for determining the power and cos Phi. They can be used with the KRIWAN products INT69 PYF Diagnose (02D187, 02D188) and the INT69 I2 Diagnose (02D186).

What must be considered when designing and installing the current transformer?

During design, a measuring range reserve for overcurrent detection of at least 20 % in relation to the rated motor current must be ensured. During installation, the L1 phase of the motor must be fed through the opening of the current transformer. For finer adjustment of the measuring range and to increase the measuring accuracy, make sure that the number of windings is correct. For details, refer to the INT69 PYF Diagnose documentation.

What is included in the scope of delivery?

The packaging contains the respective current transformer (02D186, 02D187 or 02D188) and the respective brief instructions. For 02D188, the scope of delivery also includes an adapter plate for mounting in the horizontal direction and accessories such as screws, nuts and insulating caps.

Who can I contact if I have any questions?

We are happy to help you with your questions. Simply use the contact form on our homepage and send us a request. Our customer support will get in touch with you.