RTXP18 RTXP 18 RK926015-BH Test Switch

Overview

Place of Origin:	Sweden
Brand Name:	ABB
Model Number:	RTXP18  RTXP 18 RK926015-BH
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Specifications

Description

The ABB RTXP18 RTXP 18 RK926015-BH is a high-performance test switch for the COMBITEST system, designed for safe isolation in relay protection testing. This switch offers 18 independent contact units and employs a unique "make-then-break" mechanical structure, automatically short-circuiting the current transformer (CT) circuit when the test handle is inserted, ensuring efficient and safe testing. Based on a compact COMBIFLEX plug-in design, the RTXP18 RTXP 18 RK926015-BH is widely used in relay testing and system maintenance in power plants and substations, and is a reliable standard component in the industry for achieving rapid isolation of secondary circuits.

Applications

Substations/Power Grid Plants: Relay protection panels for high-voltage and ultra-high-voltage substations.

Thermal/Hydropower Plants: Protection circuit test interfaces for generator sets and transformer sets.

Large Chemical Plants: Enterprise-owned power plants and high-voltage power distribution centers.

Steel Smelting Plants: High-power motor protection and relay protection maintenance for core power systems.

Rail Transit Power Plants: Secondary circuit verification for subway and high-speed rail traction substations.

Features

Test system meets CAT III insulation and safety requirements ofrelevant IEC standards

Fail-safe sequential disconnection of trip circuits, short-circuiting of secondary CT circuits and disconnection of secondary VT circuits, before access is made to the device to be tested through the test handle CAT III banana test cable access points

Latching feature when the test-plug handle is withdrawn allowing the relay to stabilize with actual CT currents and VT voltages before the trip circuits are restored. This prevents inadvertent tripping

Complete isolation of secondary instrument transformer circuits

Trip-block plug which isolates a trip circuit without interrupting other circuits, allowing the trip output to be monitored, and also provides visual indication of an isolated trip circuit

Design

The COMBITEST system comprises of the test switch RTXP, the test-plug handle RTXH and the block-plug handle, RTXF. These are designed in three different versions equipped with either 8, 18 or 24 contacts.

Together with the test leads, the trip-block plug RTXB, and an ammeter test-plug RTXM, the COMBITEST forms a complete system for the fast and safe testing of protection relays.

FAQ

Q1: How many current loops does the RTXP18 RTXP 18 RK926015-BH support?
Its 18 contacts can be flexibly configured according to the specific wiring diagram, typically supporting multiple three-phase current and tripping circuits.

Q2: Does the secondary circuit of the RTXP18 RTXP 18 RK926015-BH automatically disconnect when the test handle is inserted?
Yes. Inserting the handle mechanically pushes the contacts to disconnect, simultaneously connecting the external tester to the relay side and short-circuiting the CT side.

Q3: Do the internal parts of the RTXP18 RTXP 18 RK926015-BH switch need to be replaced periodically?
Generally not. It is a purely mechanical structure, and will only be replaced if a severe short circuit occurs, causing burnout or physical damage.

Q4: Why does my RTXP18 RTXP 18 RK926015-BH protection device alarm after the handle is removed?
Please check if the self-resetting contacts inside the switch are fully closed after the handle is removed. Poor closure will cause the sampling circuit to be open.

Q5: Can the RTXP18 RTXP 18 RK926015-BH be operated under load?
Yes. The RTXP18 RTXP 18 RK926015-BH is designed for secondary circuit testing without interrupting the main load current.