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Sélectionner tout	Attribut	Valeur
	Marque	Dold
	Product Type	Monitoring Relay
	Function	Monitoring
	Contact Configuration	SPDT
	Mount Type	DIN Rail
	Switching Voltage	400V
	Power Consumption	2.5VA
	IP Rating	IP40, IP20
	Supply DC Voltage	220 V dc
	Contact Current	6A
	Minimum Operating Temperature	-20°C
	Maximum Operating Temperature	60°C
	Height	77mm
	Length	115mm
	Standards/Approvals	IEC/EN 61 000-4-2, IEC/EN 61 000-4-4, UL Subject 94, IEC/EN 60 068-1, IEC/EN 61 557, IEC/EN 60 068-2-6, EN 55 011, IEC/EN 60 947-5-1, EN 50 005, IEC/EN 60 529, IEC/EN 61 000-4-5, DIN 46 228-1/-2/-3/-4, IEC 60 664-1, IEC/EN 60 715, IEC/EN 60 999-1
	Series	AI 898
	Width	45mm

	Sélectionner tout
	Marque Dold
	Product Type Monitoring Relay
	Function Monitoring
	Contact Configuration SPDT
	Mount Type DIN Rail
	Switching Voltage 400V
	Power Consumption 2.5VA
	IP Rating IP40, IP20
	Supply DC Voltage 220 V dc
	Contact Current 6A
	Minimum Operating Temperature -20°C
	Maximum Operating Temperature 60°C
	Height 77mm
	Length 115mm
	Standards/Approvals IEC/EN 61 000-4-2, IEC/EN 61 000-4-4, UL Subject 94, IEC/EN 60 068-1, IEC/EN 61 557, IEC/EN 60 068-2-6, EN 55 011, IEC/EN 60 947-5-1, EN 50 005, IEC/EN 60 529, IEC/EN 61 000-4-5, DIN 46 228-1/-2/-3/-4, IEC 60 664-1, IEC/EN 60 715, IEC/EN 60 999-1
	Series AI 898
	Width 45mm

Insulation monitor for direct current networks, AI898

Fixed response time 6 kΩ

LED display for operational readiness and earth fault

1 changeover

Overall width 45 mm

The AI898 insulation monitor displays the insulation resistance of unearthed direct current networks to earth. It does not detect symmetrical earth faults. In practice, these faults are generally insignificant.

The AI898 works on the quiescent current principle, for example when the auxiliary voltage is applied to terminals A1 → A2 the output relay is activated and the "ON" LED indicates that the insulation resistance RAN is not less than the minimum value. If insulation resistance falls below the response value, the output relay drops, the "ON" LED goes out and the second LED for "Earth fault" lights up.

A bridge between terminals LT1 and LT2 (inserted as standard) allows the AI898 to be programmed for memory storage behaviour; remove the bridge to programme hysteresis behaviour. The bridge can be replaced with a delete key with an NC contact. A test key (PT) tests the functional efficiency of the device (as per VDE 0435).

Dold Monitoring Relay, SPDT, DIN Rail 220 V dc

Frais de livraison offerts pour toute commande de plus de 90,00 €

Insulation monitor for direct current networks, AI898

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