TKEL5R series residual current circuit breaker-Taikai Electric Appliance-Dedicated to low-voltage equipment

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TKEL5R series residual current circuit breaker

The TKEL5R series residual current circuit breaker (hereinafter referred to as Circuit-breaker) is a newly developed external Moulded-case circuit breaker (MCCB) for electricity meters. It is suitable for the State Grid and Southern Grid electricity information collection and management systems. Based on the user's electricity account balance, the prepaid electricity meter controls the on/off status of the Circuit-breaker. The rated insulation voltage of the circuit breaker is 1000V, suitable for 50Hz AC, rated voltage of 440V and below, rated control voltage of 220V, and rated current of 400A and below circuits.

Belonging Category:

External electric meter circuit breaker

Keywords:

TKEL5R series residual current circuit breaker

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Product Details

Product Introduction

The TKEL5R series residual current operated circuit breaker (hereinafter referred to as circuit breaker) is a newly developed external moulded-case circuit breaker (MCCB) for electricity meters. It is suitable for the State Grid and Southern Grid electricity information collection system management. Based on the user's electricity account balance, it controls the on/off state of the circuit breaker through a prepaid electricity meter. The rated insulation voltage of the circuit breaker is 1000V, suitable for 50Hz AC, rated voltage of 440V and below, rated control voltage of 220V, and rated current of 400A and below circuits.

Standards Compliance

GB/T 14048.1 Low-voltage switchgear and controlgear - Part 1: General rules

GB/T 14048.2 Low-voltage switchgear and controlgear - Part 2: Circuit-breakers

GB/T 32902 Residual current operated circuit-breakers (CBAR) with automatic reclosing function

GB/T 22387 Residual current operated relays

Normal and Installation Conditions

Ambient air temperature: -20℃~+40℃, average temperature not exceeding +35℃. For use in environments with average temperatures above +35℃ or below -20℃, please consult the manufacturer.

The altitude of the installation site shall not exceed 2000m. For high-altitude areas, the derating coefficient table should be used for calculation.

At a maximum temperature of +40℃, the relative humidity of the air should not exceed 50%; higher relative humidity is permissible at lower temperatures, e.g., 90% at 20℃.

Pollution degree: Level 3

Location free from rain and snow erosion

Maximum tilt angle for circuit breaker installation: ±5°

Installation category: The main circuit installation category for the circuit breaker is Ⅲ, and the installation category for the auxiliary and control circuits is Ⅱ.

External magnetic field at the installation site should not exceed 5 times the geomagnetic field in any direction.

Product Features

Multi-functional It has residual current, overcurrent, and short-circuit protection functions. It also includes practical functions such as automatic reclosing, residual current display, real-time load current display, operating status indication, and trip data display. The product can also be equipped with a pluggable lightning protection module, remote control functions, and a dedicated adapter.

Compact Size The combination of electric operating mechanism and air circuit breaker (ACB) is integrated into a single unit. This reduces the installation space and simplifies wiring. It has an operating method with configurable functional characteristics, allowing for the setting of operating current, tripping time, and main circuit current according to actual needs.

Intelligent The intelligent control circuit consists of a single-chip microprocessor, which can set and display the load current, monitor the cause of fault tripping, and display the fault parameters at the time of tripping. The total number of various fault trips can be queried.

Communicable (Optional) The communication type leakage circuit breaker can record and query detailed data such as the phase sequence, cause, and time of tripping. It has a historical data recording function. The communication type series products use an RS-485 communication port and offer various communication protocols to choose from. They can communicate with intelligent transformer substations, host computers, etc., to achieve remote parameter adjustment, information query, and fault parameter download.

Model and Meaning

250

Serial Number	Description	Model Meaning
1	Enterprise code	TK: Shandong Taikai Electrical Appliance Co., Ltd.
2	Product Category	EL: Circuit breaker with residual current protection
3	Design SN	5
4	Function Code	R: Automatic reclosing function
5	Frame size	250, 400
6	Pole number	3N: Represents 3P+N (3 protective poles, N pole normally open)
7	Display method	S: Digital tube type Y: LCD type
8	Additional functions	FK: Indicates fee control function FZ: Indicates auxiliary function No additional function can be omitted

Selection Example:

TKEL5R-250/3NS FK 250A 150 units;

Order 150 units of TKEL5R series residual current operated circuit breakers with a frame size and rated current of 250A, digital tube display, 3P+N pole number, and fee control function.

Circuit Breaker Status Control Table (For Fee Control)

Serial Number	Phase Wire	Control Signal Wire	Initial State	State After Operation	Remarks
1	AC220V	↑	Trip	Close	(Changes from 0V to AC220V) Received close signal
2	AC220V	AC220V	Close	Trip	Manual Trip
3	AC220V	AC220V	Trip	Close	Manual Close
4	AC220V	↓	Close	Trip	(Changes from AC220V to 0V) Received trip signal
5	AC220V	↓	Trip	Trip	(Changes from AC220V to 0V) Received trip signal
6	AC220V	0V	Trip	Trip	0V control signal, closing is not allowed (manual)
7	AC220V →0V→AC220V	AC220V	Close	Close	Before power failure, the circuit breaker is in the closed state. After power failure and power restoration, opening the circuit breaker is not allowed, nor is it allowed to open and then close it again.
8	AC220V →0V→AC220V	AC220V	Trip	Trip	Before power failure, the circuit breaker is in the open state. After power failure and power restoration, closing the circuit breaker is not allowed, nor is it allowed to close and then open it again.
9	0V	/	Trip	Trip	Power failure; maintain the original state.
10	0V	/	Close	Close	Power failure; maintain the original state.

Main technical parameters

Product Model		TKEL5R-250	TKEL5R-400
In(A)		250A	400A
Overload long-time delay setting range		(0.4-1) In
Ui(V)		AC 1000
Uimp(V)		12000
Ue(V)		AC380/400/415 50Hz
Pole number		3P+N (3 protective poles, N pole always on)
Rated residual operating current IΔn(mA)		50-800mA automatic tracking, protection exit
Maximum non-drive time (ms)		60ms adjustable
Breaking capacity	Icu(kA)	50	65
Breaking capacity	Ics(kA)	35	50
Rated short-time withstand current Icw(kA)/1s		10	10
Usage category		Class B	Class B
Rated residual short-circuit connection and breaking capacity		25% Icu
Reclosing interval time (s)		20-60s (manual closing is not subject to time interval restrictions)

Functions and protection characteristics

Overload long-delay protection

Parameters		Adjustment range	Default value
Setting current Ir	TKEL5R-250	100A、125A、140A、160A、180A、200A、225A、250A	250A
Setting current Ir	TKEL5R-400	160A、200A、225A、250A、315A、350A、400A	400A
Setting time Tr		3s-18s adjustable, step 1s	3s
Protection characteristics	Current	Agreed operating time
Power distribution protection	1.05Ir	> 2h No action
	1.30Ir	< 2h Action
	I	Inverse time action, action time T=(6Ir/I)²Tr ±15%

Short-circuit instantaneous protection

Parameters		Adjustment range	Default value
Setting current Ii		4Ir、5Ir、6Ir、7Ir、8Ir、9Ir、10Ir、11Ir、12Ir、13Ir、14Ir	10Ir
Protection characteristics	Current	Agreed operating time
Short-circuit instantaneous protection	≤0.85Ii	No action
Short-circuit instantaneous protection	I≥1.15Ii	Action time T < 200ms