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Motor Protection in Explosive Areas – G EEx

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Motor protection in explosive or hazardous areas

Certificates for use as category 3 -Directive ATEX 94/9/EC
For 3-phase motors up to 1000 Vac
Currents from 1,5 to 630 A and higher
With thermal memory
Visual indication of tripping cause

atex-logo2

Model	Code		Range	Motor 400 V		Protections - Functions
Model	Aux. supply 230V	Aux. supply 115V	(A)	HP	kW
G17 (Ex)	10723	10722	5 – 17,7	3 – 10	2,2 – 7,5	âœ“	âœ“	âœ“

Applications

These relays are applicable for EEx motors with intensities of up to 630A and above, which run in potentially explosive areas such as:

Petrochemical industries
Plastics factories
Etc.

The relay is installed outside the explosive area.

Technical Parameters

Termal memory / Overload Trip	Yes/From 1,1 x IB
Maximum Motor Nominal Voltage	1000 Vac
15 adjustable tripping curves	Cold tripping at 6 x IB from 2 to 30s
Phase Imbalance Protection	Over 40% tripping time <3s
PTC Min/Max cold resist - Average trip/reset resist	100Ω / 1500Ω – 2750Ω
Reset Mode	Manual and Remote
Signalling LED’s	4 LED’s
Single phase auxiliary power supply
Voltage US	115 – 230 Vac (+15% – 6%) / 24 Vdc (±10%)
Frequency	50/60 Hz (from 49 to 61,2 Hz)
Consumption	2,5 VA (115-230 Vac) – 1.5 W (24 Vdc)
Protection fuse	GL 6A
Output Contacts	1 relay with 1 NO + 1 NC
Switching Power	Ith: 5A; AC15 – 250V -2A; DC13 – 30V – 2A
Short-circuit resistance	1000A
Short Circuit Withstand Rating (SCR)	5000A at 0,5s (SCR5000@0,5s)
Terminals: Max. section / screw torque	2,5 mm2, No. 22 – 12AWG / 20Ncm, 1,8 LB – IN
Protection degree / weight / mounting	IP20 / 0,5 kg / DIN rail
Storage Temperature	-30º / +70º
Operating Temperature	-15º +60ºC
Standards	EN 50081-2, EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 60529, EN 60947-5-1, UL 508 EN 60947-1, EN 60947-4-1, EN 60255-8, EN 954-1, EN 60079-14, EN 60034-1, EN 50019
	CE UL-US LISTED

Trip Curves

Cold curve: represents the performance of the relay without any previous current flow, first start. Warm curve: the tripping times decrease as the current flows, and are adapted to the motor heating condition based on the thermal memory, the warm condition (IEC-255) is reached after a current of 0.9 x IN (motor rated current) flows during 2 hours approximately.