Eaton ATC-900 - Page 9

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Instructional Booklet
Effective: March 2021 Page 9
Operation and Maintenance Manual,
Automatic Transfer Switch Controller, ATC-900
Table 1. Current, Voltage, Frequency, Metering Data.
Table 2. Power Metering Data.
Voltage Inputs (Measurement Category)
• Range: Universal, Auto-ranging up to 416 Vac L-N, 721 Vac
L-L
• Supported hookups: 3 Element Wye, or Delta
• Input Impedance: 2 MOhm/Phase
• Burden: 0.0072 VA/Phase at 120 Volts
• Fault Withstand: Meets IEEE C37.90.1
Current Inputs
• 5 A Nominal, 5 A Maximum
• Burden: 0.0115 VA per Phase max at 5A
• Pickup Current: 0.1% of Nominal
• Connections: Screw Terminal
• Fault Withstand: 100 A/10 sec., 300 A/3 sec., 500 A/1 sec.
Isolation
• All inputs are isolated to 2600 Vac
Measurement Methods
• Voltage, Current: True RMS
• Power: Sampling at 64 Samples per Cycle on All Channels Mea-
sured Readings Simultaneously
• A/D Conversion: 16 simultaneous 12 bit Analog-to-Digital Con-
verters
Mechanical Parameters
• Depth: 1.58"
• Total depth including controller is 2.60" + 1.58" = 4.18 C
Total
Figure 3 . DCT Module attached.
Compliance
• UL Listing: E38116, Vol.3, Sec. 18
• ULT 991 Effects of shipping and storage test
• Thermal cycling test
• Humidity test
• UL 1008 Dielectric test
• FCC Part 15 Conducted/radiated emissions (Class A)
• CISPR 11 Conducted/radiated emissions (Class A)
• IEC 61000-4-2 Electrostatic discharge test
• IEC 61000-4-3 Radiated susceptibility tests
• IEC 61000-4-4 Fast transient tests
• IEC 61000-4-5 Surge withstand tests
• IEC 61000-4-6 Conducted immunity tests
• IEC 61000-4-8 Conducted magnetic fields
• IEC 61000-4-11 Voltage dips and interruptions
• IEC 61000-3-2 Harmonics
• IEC 61000-3-3 Voltage flicker/fluctuation
• Seismic IBC/CBC certified
• CSA conformance C22.2 No. 178-1978 (reaffirmed 1992)
CURRENT METERING UNITS ACCURACY NOTES
lA, lB, IC, Amperes ±1% of
Reading
Accuracy applicable for 5 to 100% of I,
and current will start metering at 2%
CURRENT METERING RANGE NOTES
Current Unbalance -- 0-100%
VOLTAGE METERING UNITS ACCURACY NOTES
VAB, VBC, VCA Volts ±1% of
Reading
Applicable to Volt range of 34 to721 Vac
FREQUENCY
METERING
UNITS ACCURACY NOTES
Frequency Hz ±0.2 Hz of
Reading
Applicable to Volt range of 34 to 721 Vac
POWER METERING UNITS ACCURACY NOTES
Active kW ±1.5% of Reading Approximately 1-second update
Apparent kVA ±1.5% of Reading Approximately 1-second update
Reactive kvar ±1.5% of Reading Approximately 1-second update
PF (power factor) --- 0-±1.00
DCT Part#
70C1778G01