isopv and AGH-PV Ground Fault Detector for Ungrounded Solar Arrays up to 1100 V And Isolation Tester Prior to Array Startup (Grounded and Ungrounded)
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1 T M 1 isopv and AGH-PV Ground Fault Detector for Ungrounded Solar Arrays up to 1100 V And Isolation Tester Prior to Array Startup (Grounded and Ungrounded) Technical Bulletin NAE /
2 isopv and AGH-PV Ground fault detector for ungrounded soalr arrays and isolation tester prior to array startup Description Designed specifically for photovoltaic systems, BENDER's isopv ground detector provides early indication of ground faults before leakage current may even be present. The isopv is specifically designed for PV systems and detects both AC and DC ground faults by monitoring the system's insulation resistance. The isopv's digital display shows the insulation resistance in real-time. Alarm LEDs provide visual indication of an alarm state. Two voltage-free SPDT alarm contacts are available. The isopv is compatible with BENDER's advanced communication system for remote visualization capabilities. isopv Features Fufills ground fault detection requirements of NEC and CEC (1)(e) for ungrounded solar arrays Fufills upcoming 2014 requirements of NEC 690.5(A)(1) and NEC (C)(1) for isolation testing of solar arrays (grounded and ungrounded) prior to startup Designed specifically for photovoltaic systems up to 793 VAC / 1100 VDC May also be used to check PV isolation before system startup on all types of arrays Two separately adjustable response values kω Various AMP Plus measurement methods s selectable for optimized use Automatic adaptation to the system leakage capacitance Info button to display device settings and system leakage capacitance Self monitoring with automatic alarm Automatic self test, selectable for external meter Test and reset button External test/reset button terminals Two SPDT alarm contacts Normally energized or de-energized operation, selectable Backlit LCD display RS-485 interface The isopv may also be used for determining PV circuit isolation prior to system startup per upcoming requirements in the 2014 NEC. Function When the insulation resistance from system to ground falls below the set response value, the alarm relays switch and the alarm LEDs activate. Two separately adjustable alarmcontacts can be set to a prewarning and main warning alarm. The measured value is indicated on the LCD display or an externally connectable measuring instrument. A fault storage setting allows the device to reset automatically or require a manual reset. An external and internal test/reset can be activated remotely or on the device. A comprehensive INFO menu displays additional information such as the system's leakage capacitance. The isopv monitors the equipment ground connection to ensure proper operation. The device's easy-to-use onboard menu manages all settings via the detailed LCD screen. Additional Features History memory with real-time clock to store up to 300 timestamped event records Galvanically isolated RS-485 interface for data exchange with other Bender devices and communication gateways Standby contacts and RS-485 communication for operating multiple ground fault detectors in systems tied together with tiebreakers or interlocks Galvanically isolated analog output, 0(4 ) 20 ma Use in Interconnected Ungrounded Systems Only one BENDER insulation monitor may be active when several ungrounded systems are coupled together. The disconnect relays and control inputs F1/F2 integrated into the iso-pv guarantee no interference with other BENDER devices when system coupling is activated. Measurement Method The IRDH275(B) series uses the AMP Plus measuring principle. This measuring principle allows for the concise monitoring of modern power supply systems, pure DC systems, systems where AC/DC rectification and power conversion may occur, and systems with high leakage capacitances. Approvals 2
3 Display and Controls 8 Wiring 3Ø AC System, W/O N 1Ø AC System 3 U n 4 3Ø AC System, W/ N DC System U n INFO key: displays pertinent system information ESC key: Goes back a step inside device's menu 2 - TEST button: Activates self-test Arrow up key: Scrolls up inside device's menu 3 - RESET button: Resets device Arrow down key: Scrolls down inside device's menu 4 - MENU key: Activates device's internal menu Enter key: Confirm change inside device's menu 5 - Alarm LED 1 lights: Insulation fault, 1st warning level reached 6 - Alarm LED 2 lights: Insulation fault, 2nd warning level reached 7 - Alarm LED, device error 8 - LCD display Supply voltage used to power device (see ordering information). UL and CSA require the use of 5 A fuses. 2, 3 - Wiring diagrams for connecting to three-phase AC systems 4 - Wiring diagram for connecting to single-phase AC system 5 - Wiring diagram for connecting to DC system 6 - Separate connections of and KE to equipment ground 7 - External test button (N/O contact) 8 - External reset button (N/C contact) 9 - Standby contact. When the contact is closed, no measurements take place Analog output, galvanically isolated: 0 20 ma or 4 20 ma 11 - RS-485 communication interface (termination with a 120 Ω resistor) 12 - Alarm relay 1, normally energized or de-energized contact 13 - Alarm relay 2 and device error output, normally energized or de-energized contact 3
4 Application Examples Ungrounded solar array utilizing isopv ground fault detector and AGH-PV voltage coupler Array Grid Solar array Ungrounded DC Array, VDC Non-isolated inverter Wiring - between iso-pv and AGH-PV voltage coupler 4
5 Multiple, coupled ungrounded arrays monitored by multiple isopv ground fault detectors, utilzing standby contacts Solar array 1 Solar array 2 Grid transformer Solar array 1 Grid transformer Solar array 2 5
6 Technical Data: isopv Insulation coordination acc. to IEC Rated insulation voltage for iso-pv-3 AC 250 V Rated impulse voltage/pollution degree 6 kv / III Protective separation (reinforced insulation) between (A1/+, A2/-) - (11,12, 14, 21, 22, 24) - (Ak1, AK2, KE, PE, T1, T2, R1, R2, F1, F2, M+, M-, A, B) Dielectric test acc. to IEC kv Rated insulation voltage AC 250 V Rated impulse voltage/pollution degree 4 kv / III Basic insulation between: (11, 12, 14) - (21, 22, 24) Voltage test acc. to IEC kv Voltage ranges Nominal system voltage U n See AGH-PV technical data iso-pv-335: Supply voltage U S (also see nameplate) AC V** Frequency range U S Hz Power consumption 16 VA Supply voltage U S (also see nameplate) DC V** Power consumption 8 W iso-pv-327: Supply voltage U S (also see nameplate) DC V** Power consumption 8 W Response values Response value R an1 200 Ω 100 kω Factory setting R an1 (Alarm1) 4 kω Response value R an2 200 Ω 100 kω Factory setting R an2 (Alarm2) 1 kω Relative uncertainty (7 kω 100 kω) (in accordance with IEC : ) ±15 % Relative uncertainty (0.2 kω 7 kω) ±1 kω Response time t an see table TGH1454 starting from page 39 Hysteresis 25 %, +1 kω Measuring circuit Measuring voltage U m (peak value) ± 50 V Measuring current I m (at R F = 0 Ω) 1.5 ma Internal DC resistance DC R i 35 kω Impedance Z i at 50 Hz 35 kω Permissible extraneous DC voltage U fg DC 1100 V Max. system leakage capacitance C e 2000 μf (2000 μf)* Displays Display, illuminated two-line display Characters (number / height) 2 x 16 / 4 mm Display range measured value 0.2 kω.1 MΩ Operating uncertainty ±15 %, ±1 kω Outputs/Inputs Test / reset button internal/external Cable length test / reset button, external 10 m Current output (load) 0/4 20 ma ( 500 Ω) Accuracy current output, related to the value indicated (1 kω 100 kω) ±15 %, ±1 kω Serial interface Interface / protocol RS-485 / BMS terminals A/B Cable length 1200 m Shielded cable (shield to PE on one end) 2-core, 0.6 mm², z. B. J-Y(St)Y 2 x 0.6 Terminating resistor 120 Ω (0.5 W) Device address, BMS bus 1 30 ( 3)* Switching elements Switching elements 2 SPDT contacts Operating mode K1, K2 Normally energized or de-energized operation (de-energized)* Contact data acc. to IEC : Utilisation category AC 13 AC 14 DC-12 DC-12 DC-12 Rated operational voltage 230 V 230 V 24 V 110 V 220 V Rated operational current 5 A 3 A 1 A 0.2 A 0.1 A Minimum contact rating 1 ma at AC/DC 10 V Environment / EMC EMC not suitable for household and small companies IEC : Ed. 1.0 Operating temperature -13 ºF +149 ºF (-25 ºC +65 ºC) Classification of climatic conditions acc. to IEC 60721: Stationary use (IEC ) 3K5 (with condensation and formation of ice) Transport (IEC ) 2K3 (with condensation and formation of ice) Long-term storage (IEC ) Classification of mechanical conditions acc. to IEC 60721: Stationary use (IEC ) for screw fixing with accessories B K4 (with condensation and formation of ice) 3M7 for DIN rail mounting 3M4 Transport (IEC ) 2M2 Long-time storage (IEC ) 1M3 screw-type terminals, rigid/flexible AWG (0.2 4 mm²) / AWG ( mm²) flexible with connector sleeve AWG ( mm²) Tightening torque 0.37 Lb-ft (0.5 Nm) Conductor sizes (AWG) Cable length between iso-pv and AGH-PV 1.5 ft (0.5 m) Other Operating mode continuous operation Mounting display oriented Distance to adjacent devices 30 mm Degree of protection, internal components (DIN EN 60529) IP30 (NEMA 1) Degree of protection, terminals (DIN EN 60529) IP20 (NEMA 1) Type of enclosure X112, free from halogen DIN rail mounting DIN EN / IEC Screw mounting by means of support 2 x M4 Flammability class UL94 V-0 Software version D351 V2.0 Weight < 510 g ( )* = factory setting The values marked with** are absolute values 6
7 Technical Data: AGH-PV Insulation coordination acc. to IEC Rated insulation voltage AC 800 V Rated impulse voltage/pollution degree 8 kv / 3 Voltage ranges Nominal system voltage U n AC, 3(N)AC V, DC V Nominal frequency f n DC, Hz Max. AC voltage U~ in the frequency range f n = Hz: U~ max = 110 V/Hz * f n Environment / EMC EMC IEC : Ed. 1.0 Operating temperature -13 ºF +149 ºF (-25 ºC +65 ºC) Classification of climatic conditions acc. to IEC 60721: Stationary use (IEC ) 3K5 (with condensation and formation of ice) Transport (IEC ) 2K3 (with condensation and formation of ice) Long-term storage (IEC ) 1K4 (with condensation and formation of ice) Classification of mechanical conditions acc. to IEC 60721: Stationary use (IEC ) 3M7 Transport (IEC ) 2M2 Long-time storage (IEC ) 1M3 screw-type terminals, rigid/flexible AWG (0.2 4 mm²) / AWG ( mm²) flexible with connector sleeve AWG ( mm²) Tightening torque 0.37 Lb-ft (0.5 Nm) Conductor sizes (AWG) Cable length between iso-pv and AGH-PV 1.5 ft (0.5 m) Other Operating mode continuous operation Mounting cooling slots must be ventilated vertically! Distance to adjacent devices min. 1.2" (30 mm) Degree of protection, internal components (DIN EN 60529) IP30 (NEMA 1) Degree of protection, terminals (DIN EN 60529) IP20 (NEMA 1) Type of enclosure X112, free from halogen DIN rail mounting DIN EN / IEC Screw fixing 2 x M4 Flammability class UL94 V-0 Weight < 230 g Dimensions: isopv Dimensions in inches (mm) Dimensions: AGH-PV Dimensions in inches (mm) 4.1 (104) 0.2 (5) 4.4 (111) 2.8 (71) 3.6 (91) 2.35 (60) Ø 0.2 (5.5) for screw mounting Ordering Information 1) Supply voltage U S AC DC Type Ordering No V isopv AGH-PV B W V ( Hz) V isopv AGH-PV B W 7
8 Document NAE / / Bender Inc. All Rights Reserved. Your local contact: T M USA Exton, PA / Mexico and Central America Tampa, FL info@bender.org Canada Mississauga, ON / info@bender-ca.com South America Santiago de Chile info@bender-latinamerica.com
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