ES-0137 Rev.5
AECT
Limit Alarms (with DC output) AE-UNIT
CT ALARM
Functions & Features
• Providing SPDT relay outputs at preset AC current levels from a CT
• True RMS sensing
• Dual (Hi/Lo) trip
• Additional isolated DC output proportional to the input
• CT Protector provided for open-circuit protection
• Energized or de-energized coil at a tripped condition selectable
• Thumbwheel switch adjustments
• Relays can be powered 110 V DC
MODEL: AECT–[1][2][3][4][5][6]–[7][8]
ORDERING INFORMATION
• Code number: AECT-[1][2][3][4][5][6]-[7][8]
Specify a code from below for each of [1] through [8].
(e.g. AECT-1A1111-D/Q)
• Special DC output range (For codes Z & 0)
• Specify the specification for option code /Q
(e.g. /C01/S01)
[1] INPUT
Current
1
: 0 – 1 A AC
5
: 0 – 5 A AC
[2] DC OUTPUT
N
: None
Current
A
: 4 – 20 mA DC (Load resistance 350 Ω max.)
B
: 2 – 10 mA DC (Load resistance 700 Ω max.)
C
: 1 – 5 mA DC (Load resistance 1400 Ω max.)
D
: 0 – 20 mA DC (Load resistance 350 Ω max.)
E
: 0 – 16 mA DC (Load resistance 430 Ω max.)
F
: 0 – 10 mA DC (Load resistance 700 Ω max.)
G
: 0 – 1 mA DC (Load resistance 7000 Ω max.)
Z
: Specify current (See OUTPUT SPECIFICATIONS)
Voltage
1
: 0 – 10 mV DC (Load resistance 10 kΩ min.)
2
: 0 – 100 mV DC (Load resistance 100 kΩ min.)
3
: 0 – 1 V DC (Load resistance 1000 Ω min.)
4
: 0 – 10 V DC (Load resistance 10 kΩ min.)
5
: 0 – 5 V DC (Load resistance 5000 Ω min.)
6
: 1 – 5 V DC (Load resistance 5000 Ω min.)
4W
: -10 – +10 V DC (Load resistance 10 kΩ min.)
5W
: -5 – +5 V DC (Load resistance 5000 Ω min.)
0
: Specify voltage (See OUTPUT SPECIFICATIONS)
[3] SETPOINT 1 OUTPUT
1
: Hi (coil energized at alarm)
2
: Hi (coil de-energized at alarm)
3
: Lo (coil energized at alarm)
4
: Lo (coil de-energized at alarm)
[4] SETPOINT 2 OUTPUT
1
: Hi (coil energized at alarm)
2
: Hi (coil de-energized at alarm)
3
: Lo (coil energized at alarm)
4
: Lo (coil de-energized at alarm)
[5] ON DELAY TIME
0
: 0.5 seconds
1
: 1 second
2
: 2 seconds
3
: 3 seconds
4
: 4 seconds
[6] POWER ON DELAY TIME
1
: 1 second
2
: 2 seconds
3
: 3 seconds
4
: 4 seconds
5
: 5 seconds
[7] POWER INPUT
AC Power
B
: 100 V AC
C
: 110 V AC
D
: 115 V AC
F
: 120 V AC
G
: 200 V AC
H
: 220 V AC
J
: 240 V AC
DC Power
S
: 12 V DC
R
: 24 V DC
V
: 48 V DC
P
: 110 V DC
[8] OPTIONS
blank
: none
/Q
: With options (specify the specification)
SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to our web site.)
/C01
: Silicone coating
/C02
: Polyurethane coating
/C03
: Rubber coating
TERMINAL SCREW MATERIAL
/S01
: Stainless steel
GENERAL SPECIFICATIONS
Construction
: Plug-in
Connection
: M3.5 screw terminals
Screw terminal
: Chromated steel (standard) or stainless steel
Housing material
: Flame-resistant resin (black)
Isolation
: Input to DC output to alarm output 1 to alarm output 2 to power
Input waveform
: Up to 15 % of 3rd harmonic content
Overrange output
: 0 to 120 % at 1 – 5 V
Zero adjustment
: -5 to +5 % (front)
Span adjustment
: 95 to 105 % (front)
Setpoint adjustments
: Thumbwheel switches (front);
0 – 99 % independently; 1 % increments
Hysteresis (deadband) adjustments
: Thumbwheel switches (front); 0.5, 1 – 9 % independently; 1 % increments (SW position 0 = 0.5); [Lo SP + Hysteresis] ≤ 102
Front LEDs
: Red LED turns on when the coil is energized.
INPUT SPECIFICATIONS
Frequency
: 50 or 60 Hz
Input burden
: 0.5 VA maximum
Overload capacity
: 500 % of rating for 5 sec., 120 % continuous
Operational range
: 0 – 100 % of rating
OUTPUT SPECIFICATIONS
■
DC
Output
•
DC Current
: 0 – 20 mA DC
Minimum span
: 1 mA
Offset
: Max. 1.5 times span
Load resistance
: Output drive 7 V maximum
•
DC Voltage
: -10 – +12 V DC
Minimum span
: 5 mV
Offset
: Max. 1.5 times span
Load resistance
: Output drive 1 mA maximum; at ≥ 0.5 V
■
Alarm Output
: Relay contact
100 V AC @ 1 A (cos ø = 1)
120 V AC @ 1 A (co s ø= 1)
240 V AC @ 0.5 A (cos ø = 1)
30 V DC @ 1 A (resistive load)
Maximum switching voltage
: 380 V AC or 125 V DC
Maximum switching power
: 120 VA or 30 W
Minimum load
: 5 V DC @ 10 mA
Mechanical life
: 5 x 10
7
cycles
For maximum relay life with inductive loads, external protection is recommended.
INSTALLATION
Power input
•
AC
: Operational voltage range: rating ±10 %,
50/60 ±2 Hz, approx. 3 VA
•
DC
: Operational voltage range: rating ±10 %, or 85 – 150 V for 110 V rating (ripple 10 % p-p max.)
approx. 2 W (80 mA at 24 V)
Operating temperature
: -5 to +55°C (23 to 131°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: Surface or DIN rail
Weight
: 450 g (0.99 lb)
PERFORMANCE in percentage of span
•
DC output
Accuracy
: ±0.3 %
Response time
: ≤ 0.7 secs. (0 – 90 %)
•
Alarm output
Setpoint accuracy
: ±0.8 %
Hysteresis (Deadband) setpoint accuracy
: ±0.3 %
ON delay time accuracy
: Rating ±20 % or 0.7 sec.,
whichever is greater.
Power ON delay time accuracy
: Rating ±30 %
Trip point repeatability
: ±0.05 %
Temp. coefficient
: ±0.015 %/°C (±0.008 %/°F)
Line voltage effect
: ±0.1 % over voltage range
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 2000 V AC @ 1 minute
(input to DC output to alarm output 1 to alarm output 2 to power to ground)
EXTERNAL VIEW
EXTERNAL DIMENSIONS unit: mm [inch]
TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM