Schneider Electric and 6.0A, 3.0A, 2.0A, 5.0A manual Instantaneous Protection

Micrologic™ 2.0A, 3.0A, 5.0A, and 6.0A Electronic Trip Units	48049-136-05
Section 1—General Information	Rev. 01, 07/2012

Instantaneous Protection

Figure 9: Instantaneous Protection Switches

ENGLISH

Instantaneous protection protects equipment against short circuits with no intentional time delay.

• Instantaneous protection (Ii) (A) is standard

on the 3.0A, 5.0A and 6.0A trip units.

• Instantaneous protection on 2.0A trip units is

achieved by using short-time protection (Isd)

with the short-time delay factory set to 0

(zero).

• Instantaneous protection on the 3.0A, 5.0A

and 6.0A trip units is based on the circuit

Micrologic 2.0A Trip Unit

06134243	.6			.95	2		16
		long time			tr			alarm
	Ir		.8			4 8
	.7			.9	(s)		12
	.5			.98	1		20
		.4 x In 1				.5 @ 6 Ir24
		instantaneous
	Isd		4
	3			5
	2.5			6
A	2			8
	1.5 x Ir 10
		setting

Micrologic 3.0A Trip Unit

06133203	.6			.95	2		16
		long time			tr			alarm
	Ir		.8 .9			4 8
	.7				(s)		12
	.5			.98	1		20
		.4 x In 1				.5 @ 6 Ir24
		instantaneous
	Ii		5
	4			6
	3			8
	2			10
A	1.5		x In	12
		setting

breaker sensor rating (In).

Micrologic 5.0A Trip Unit Micrologic 6.0A Trip Unit

• Instantaneous protection on the 2.0A trip unit

is based on the long-time pickup setting (Ir).

• Circuit breaker open command is issued as

soon as threshold current is exceeded.

• Instantaneous protection uses peak current

measurement.

• When instantaneous protection switch is set

to off, the instantaneous protection is

disabled.

06133204

		long time
	Ir		.8 .9			tr			8
	.7					(s)	4			12
	.6			.95	2					16
	.5			.98	1					20
	.4 x In 1						.5 @ 6 Ir24
		short time
	Isd		4			tsd			.4	.3
3				5		(s)	.4
					.3					.2
2.5				6
2				8	.2					.1
1.5				10			.1		2	0
			x Ir			on			I t	off
		setting						delay

alarm

instantaneous

I i

8

6 10

4 12

315

2off

x In

06133351

A

long time
Ir	.8		tr		8		alarm
.7		.9	(s) 4			12
.6		.95	2			16
.5		.98	1			20
.4 x In 1			.5 @ 6 Ir24
short time			tsd				instantaneous
Isd	4			.4	.4 .3		I i
3		5	(s)				5 8	10
2.5		6	.3			.2	4	12
2		8	.2			.1	3
1.5 x Ir		10	.1		I2t	0	2 x Inoff
			on			off
setting				delay				test
Ig			tg
	E			.4	.4 .3
D		F	(s)
C		G	.3			.2
B		H	.2			.1
A		J	.1		I2t	0
			on			off

ground fault

A

Table 3:		Micrologic Instantaneous Values
Setting			Interruption Current
2.0A	Isd (= Ir x..)		1.5	2	2.5	3	4	5	6	8	10
3.0A	Ii (= In x..)		1.5	2	3	4	5	6	8	10	12
5.0A	Ii (= In x..)		2	3	4	6	8	10	12	15	off
6.0A	Ii (= In x..)		2	3	4	6	8	10	12	15	off

Ii = UL and ANSI instantaneous

Isd = IEC instantaneous (short-time with zero delay)

In = sensor rating

Ir = long-time pickup

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