Overview

The 469 Motor Management Relay is a microprocessor-based device designed to protect and manage medium to large horsepower motors and their associated equipment. This relay features six output relays, which are used for tripping, alarms, and start blocking. It combines motor protection, fault diagnostics, power metering, and RTU (Remote Terminal Unit) functions into a single, cost-effective, drawout package. The following single-line diagram demonstrates the 469's functionality, using ANSI (American National Standards Institute) device numbers for reference.

Specifications

ANALOG CURRENT INPUTS

• Inputs: 0 to 1 mA, 0 to 20 mA, or 4 to 20 mA (settings)
• Input impedance: 226 Ω ±10%
• Conversion range: 0 to 21 mA
• Accuracy: ±1% of full scale
• Type: Passive
• Analog in supply: +24 V DC at 100 mA max.
• Response time: ≤100 ms

DIFFERENTIAL CURRENT INPUTS

• CT primary: 1 to 5000 A
• CT secondary: 1 A or 5 A (settings)
• Burden: <0.2 VA at rated load
• Conversion range: 0.02 to 1 × CT primary
• Nominal frequency: 20 to 70 Hz
• Frequency range: 20 to 120 Hz
• Accuracy: ±0.5% of 1 × CT for 5 A; ±0.5% of 5 × CT for 1 A
• CT withstand:
  • 1 second at 80 × rated current
  • 2 seconds at 40 × rated current
  • Continuous at 3 × rated current

DIGITAL INPUTS

• Inputs: 9 opto-isolated inputs
• External switch: Dry contact < 400 Ω, or open collector NPN transistor from sensor; 6 mA sinking from internal 4 KΩ pull-up at 24 V DC with Vce < 4 V DC

GROUND CURRENT INPUTS

• CT primary: 1 to 5000 A
• CT secondary: 1 A or 5 A (settings)
• Burden: <0.2 VA at rated load for 1 A or 5 A; <0.25 VA for 50:0.025 CTs at 25 A
• Conversion range: 0.02 to 1 × CT primary
• Nominal frequency: 20 to 70 Hz
• Frequency range: 20 to 120 Hz
• Accuracy:
  • ±0.5% of 1 × CT for 5 A CTs
  • ±0.5% of 5 × CT for 1 A CTs
  • ±0.125 A for 50:0.025 CTs
• CT (1 A/5 A) withstand:
  • 1 second at 80 × rated current
  • 2 seconds at 40 × rated current
  • Continuous at 3 × rated current
• CT (50:0.025) withstand: Continuous at 150 mA

PHASE CURRENT INPUTS

• CT primary: 1 to 5000 A
• CT secondary: 1 A or 5 A (specify with order)
• Burden: Less than 0.2 VA at rated load
• Conversion range: 0.05 to 20 × CT
• Nominal frequency: 20 to 70 Hz
• Frequency range: 20 to 120 Hz
• Accuracy:
  • At < 2 × CT: ±0.5% of 2 × CT
  • At ≥ 2 × CT: ±1% of 20 × CT
• CT withstand:
  • 1 second at 80 × rated current
  • 2 seconds at 40 × rated current
  • Continuous at 3 × rated current

RTD INPUTS

• 3 wire RTD Types: 100 Ω Platinum (DIN.43760), 100 Ω Nickel, 120 Ω Nickel, 10 Ω Copper
• RTD sensing current: 5 mA
• Isolation: 36 Vpk (isolated with analog inputs and outputs)
• Range: –50 to +250°C
• Accuracy: ±2°C
• Lead resistance: 25 Ω Max per lead for Pt and Ni type; 3 Ω Max per lead for Cu type
• No sensor: >1000 Ω
• Short/low alarm: <–50°C

TRIP COIL SUPERVISION

• Applicable voltage: 20 to 300 V DC / V AC
• Trickle current: 2 to 5 mA

VOLTAGE INPUTS

• VT ratio: 1.00 to 300.00:1 in steps of 0.01
• VT secondary: 273 V AC (full-scale)
• Conversion range: 0.05 to 1.00 × full scale
• Nominal frequency: 20 to 70 Hz
• Frequency range: 20 to 120 Hz
• Accuracy: ±0.5% of full scale
• Max. continuous: 280 V AC
• Burden: >500 kΩ
• Sensor supply: +24 V DC at 20 mA max.

ANALOG CURRENT OUTPUT

• Type: Active
• Range: 4 to 20 mA, 0 to 1 mA (must be specified with order)
• Accuracy: ±1% of full scale
• Max. load:
  • 4 to 20 mA input: 1200 Ω
  • 0 to 1 mA input: 10 kΩ
• Isolation: 36 Vpk (isolated with RTDs and analog inputs)
• 4 Assignable Outputs:
  • Phase A, B, and C current
  • Three-phase average current
  • Ground current
  • Phase AN (AB), BN (BC), and CN (CA) voltages
  • Three-phase average voltage
  • Hottest stator RTD
  • Hottest bearing RTD
  • Hottest other RTD
  • RTDs 1 to 12

CASE

• Type: Fully drawout (automatic CT shorts)
• Seal: Seal provision
• Mounting: Panel or 19-inch rack mount
• IP Class: IP40-X

PACKAGING

• Shipping box: 12” × 11” × 10” (W × H × D) / 30.5 cm × 27.9 cm × 25.4 cm
• Shipping weight: 17 lbs Max / 7.7 kg

ENVIRONMENT

• Ambient operating temperature: –40°C to +60°C
• Ambient storage temperature: –40°C to +80°C
• Humidity: Up to 90%, non-condensing
• Altitude: Up to 2000 m
• Pollution degree: 2