Acrel ASJ10-LD1A Earth Leakage Relay

Acrel ASJ10-LD1A Earth Leakage Relay

● The measurement of A-type after-current;

● The streamer display of current percentage;

● The setting of rated residual action current;

● The setting of non-driving time of limitation;

● Two-pair relay output;

● Possessing the function of on-the-spot and long-distance testing and resetting.

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Technical Parameters

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Acrel ASJ10-LD1A Earth Leakage Relay

General

Acrel ASJ series residual current relays are mainly suitable for TT or TN system distribution lines with AC 50Hz and rated voltage of 400V and below. They are equipped with low-voltage circuit breakers or low-voltage contactors to reduce electrical safety accidents caused by leakage and ensure the safety of staff.

Features

Frequency

50Hz±5Hz

Auxiliary power supply

AC110V, AC220V, DC85 ~270V

(permissible error ±10%)

Consumption

≤5W

Installation

DIN rail 35mm

Dimension(L*W*H)

85×54×64mm

Wiring

Dimension of ASJ10-LD1A Earth Leakage Relay

Networking of ASJ Series Earth Leakage Relay

ASJ series earth leakage reply - networking - 2_副本

ASJ series earth leakage reply - networking - 3

How Does Residual Current Device Work?

Acrel Residual Current Device Using 32-bit high-performance CPU, real-time sampling of three-phase AC current and three-phase AC voltage signals, and using the effective value calculation method to achieve high-precision measurement in a wide frequency range. Integrated with a variety of protection functions, the protection can be put in or out, alarmed or tripped with a simple selection; high precision, low power consumption, fast action, high return coefficient, no jitter, and can be used for voltage monitoring (voltage type: Such as relay protection of generators, transformers and transmission lines, etc.) or current monitoring (current type: such as in overload and short-circuit protection lines of motors, transformers and transmission lines), as overvoltage, undervoltage, overcurrent, Blocking action element or starting element for undercurrent, overfrequency, underfrequency protection.

ASJ Series Earth Leakage Relay FAQs

How many wires can be passed through a residual current transformer? Can I just put one firewire? Can I just pass firewire of A, B, C through the sensor?

In a three-phase four-wire system, 4 wires should be used. You can’t just pass a firewire, and A, B, C, N should all be passed through the Residual current transformer. A suitable transformer should be selected according to the wire diameter and rated current on site.

The wire of three phase dand four wire is very thick. Can a measuring sensor be fitted to each phase, and four sensor secendary be passed through small hole size wires. Then connect the residual current relay?

Not recommended. By this plan, at the moment of starting the high-power and high-frequency equipment, the vector sum of the output current of three-phase four-wire measurement transformer is not zero (directly measured is 0), which can easily lead to malfunction and tripping.

Can open-type residual current transformers be used in the renovation project?

For reconstruct projects, if the wire diameter of the line is less than 100mm, open-type residual current transformers can be used. It is not recommended to use open-type residual current transformers larger than this aperture, because the measurement accuracy of the large aperture sensor is poor.

Why does the residual current relay operate as soon as it is powered on？

Reason one may be wiring error; Another may be wrong product selection.

After power-off the ASJ residual current relay, the breaker will trip-out. What's the reason for this phenomenon？

This phenomenon is that the breaker will trip-out after the protected power supply is cut off; the other is to protect the line when undergoing dual power switching.

ASJ series residual current relay is the type that automatically recovers and resets when the auxiliary power fails.According above-mentioned conditions, the instrument can be selected as the type that does not automatically act when the power fails.

What does In:100A mean on the panel? Can it be removed？

In means rated current and cannot be removed. It is clearly stipulated in 4.2.2.2 and 5.1 of GB/T 22387-2016, the panel needs to be marked with the rated current or the size of the hole of the residual current transformer.

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Acrel ASJ10-LD1A Earth Leakage Relay

Types

Type	Function	Installation	Appearance
ASJ10-LD1C	AC-type residual current measurement; Alarm prompt of current crossing line; Rated residual operating current can be measured; Limit non-driving time can be set; Two sets of relay output; With local and remote “test” and “reset” functions.	Guide (DIN 35mm)
ASJ10-LD1A	A-type residual current measurement; Current percentage light column display; Rated residual operating current can be measured; Limit non-driving time can be set; Two sets of relay output (settable)note 1 ; With local and remote “test” and “reset” functions.
ASJ10L-LD1A note2	A-type residual current measurement; Rated residual operating current can be measured; Limit non-driving time can be set; Two sets of relay output (settable); Transformer breakage alarm can be set; Pre-alarm value can be set; Return value can be set. With on-site display, remote “test”, “reset” LCD display, 25 event records.
ASJ20-LD1C	AC-type residual current measurement; Alarm prompt of current crossing line; Rated residual operating current can be measured; Limit non-driving time can be set; Two sets of relay output; With local and remote “test” and “reset” functions.	Panel (48*48)
ASJ20-LD1A	A-type residual current measurement; Current percentage light column display; Rated residual operating current can be measured; Limit non-driving time can be set; Two sets of relay output (settable)note 1 ; With local and remote “test” and “reset” functions.	Panel (48*48)

Note 1: The function of setting for relay means that you can set the initialization and the output state of relay by yourself through the

code dialing on the panel; the specific setting guide can be found from the chapter 5.2.

Note 2: Optional function, RS485 interface, Modbus-RTU Communication, type is ASJ10L-LD1A/C

Technical Parameters

Technical parameter		Indicator
Technical parameter		AC type	A type
Power supply	Voltage range	AC110V、AC220V （±10%）	AC/DC85~265V
Power supply	Power consumption	≤5W
Input	Rated residual operating current I△n	0.03、0.1、0.3、0.5(A)	0.03、0.05、0.1、0.3、0.5、1、3、5、10、30(A)note 3
	Limit non-driving time △t	0.1、0.5(s)	0、0.06、0.1、0.2、0.3、0.5、0.8、1、4、10(s)note 4
	Rated residual non-operating current I△no	50%I△n	50%I△n
	Performance characteristics	Sinusoidal AC	Sinusoidal AC and pulsating DC
	Frequency	50Hz±5Hz	50Hz±5Hz
	Operating range	-20% ~ -10%I△n	-20% ~ -10%I△n
Output	Output mode	One is normally open and another is for transformation	One is normally closed or open, and another is for transformation
	Contact capacity	5A 250VAC 5A 30VDC	AL1:8A 250VAC; 5A 30VDC AL2:6A 250VAC; 5A 30VDC
	Reset mode	Local reset or remote reset	Local reset, remote reset or automatic reset
Installation and use environment	Temperature	Run temperature：-20℃ ~ +55℃，Storage temperature：-30℃ ~ +70℃
	Humidity	≤95%RH，no condensation, and no corrosive gas places
	Elevation	≤2000m
	Class of pollution	Grade three
	Installation category	Type Ⅲ