Class 8839 58M Enclosed AC Drives
Application Information
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Enclosure Types
The Class 8839 58M Enclosed AC drives are
available in Type 1, Type 1G, or Type 12
enclosures. If Type 3R, 4, or 4X enclosures are
required, consult product support or customer
service for enclosed drives.
Outside installations requiring drives should be
quoted for installation in climate controlled Type
3R walk-in enclosures available separately from
our Power Zone Center group in Smyrna, TN.
Relay Contact Ratings
Interposing relay contacts are available for
customer use. Contacts are available for run and
fault indication as standard. Optional contacts (if
selected) provide indication of bypass on, auto
mode, and communication mode. Relay contacts
are rated for switching inductive loads and ha v e a
5 A continuous current rating.
Specifications for Drive Controllers
Input voltage 460 V ±10%, 230 V ±10%, 208 V±10%
Displacement power factor 98% through speed range
Input frequency 60 Hz ± 5%
Output voltage Three-phase output
Maximum voltage equal to input voltage
Galvanic isolation Galvanic isolation between power and control
(inputs, outputs, and power suppli es)
Frequency range of power converter 0.1 to 500 Hz (factory setting of 60 Hz)
Torque/overtorque 110% of nominal motor torque for 60 s (VT)
150% of nominal motor torque for 60 s (CT)
Current 110% of controller rated current for 60 s
Switching frequency
Selectable from 0.5 to 16 kHz [1]
Factory setting:
4 kHz CT,
8 kHz for 208 V, 230 V, and 1–100 hp @460 V VT
2 kHz for 125–500 hp @ 460 V VT
Speed reference
AI1: 0 to +10 V, Impedance = 30 kΩ
Speed potentiometer to AI1
AI2: factory setting: 4 to 20 mA,
Impedance = 100 Ω (reassignable, X–Y range with keypad display).
Factory modification J10 provides a controller interface 0–10 Vdc reference signal
to the AI2 input using a 0–10 V / 4–20 mA converter with Z= 40 kΩ.
Frequency resolution in analog reference 0.1 for 100 Hz (10 bits)
Speed regulation V/f: determined by motor slip, typically 3%
Sensorless flux vector (SLFV): 1%
Efficiency 97% at full load typical
Reference sample time 5 ms
Acceleration and deceleration ramps 0.1 to 999.9 s (definition in 0.1 s increments)
Drive controller protection Thermal protection of transformer, rectifier, and power converter
Phase loss of AC mains
Circuit breaker rated at 65 kAIC
Motor protection Class 10 electronic overload protection
Class 20 electromechanical overload protection with bypass [2]
Keypad display Self diagnostics with fault messages in three languages; also refer to instr uction
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Temperature Storage for all enclosures: -13 to +149 °F (-25 to +65 °C)
Operation: +14 to +104 °F (-10 to 40 °C)
Humidity 95% with no condensation or dripping water, conforming to IEC 60068-2-3.
Altitude 3,300 ft (1000 m) maximum without derating; derating of the current by 1% for each
additional 330 ft (100 m)
Enclosure Type 1: all controllers
Type 1G: 125–500 hp @ 460 V VT only
Type 12: all except 125–500 hp @ 460 V VT
1. 1–100 hp switching frequency is factory set below 4 kHz. If operation above 4 kHz (CT) or 8 kHz (V T) is required, select the
next largest size drive controller. 125–500 hp switching frequency is factory set at 2 kHz. If operation above 2 kHz is r equired,
select the next largest size drive controller.
2. Class 10 electromechanical for 1 hp @ 460 V.