Schneider Electric Ac Current Relays Model 3DM2/FDM2
■ Micro-controller unit based
■ Real time processing / High precision
■ Protections : Over current, Under current, Phase loss, Phase reversal, Stall, Jam, Current
Imbalance, Earth fault (3MZ2/FMZ2)
■ Inverse available up to 32Amps without external CTs.
■ Ancillary functions : Fail safe, Pre-alarm (3DM2/FDM2), Accumulated running hour, 3 faults
records & limitation of auto-restart.
■ Reinforced monitoring function : Monitoring distance up to 400M, 3 phase current display,
Pre-alarm (3DM2/FDM2) & Trip cause indication
■ Bar graph indication of a load current to the current setting.
■ Available application on single and 3 phase motor
■ RoHS Compliance
■ For FDM2/FMZ2, normal protections are guaranteed even if PDM is disconnected.
EOCR Model 3DM2/FDM2 Technical Specs
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Protective Item
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Condition & Setting range
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Operation time
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Over-current
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Condition : Load current (In) exceeds setting current (Is)
Setting range : 0.5~60A (Def), 0.5~32A (Inv) |
Definite (Def) : 0.2~30s adjust.
Inverse (Inv) : 1~30 class |
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Under-current
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Condition : Load current (In) less than setting currentIn ≤ uc
uc should be less than oc setting |
oFF, 1~10s adjustable |
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Reverse phase (RP)
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Condition : Reversed phase sequence input on EOCR.
Enable or disable : Selectable |
Within 0.15s |
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Stall (Sc)
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Condition : In ≥ Stall current setting (Sc). Active only in motor starting
0.5~30A : 2~8 times of oc setting
~40A : 2~6 times,
~60A : 2~4 times. |
Right after D-time elapsed |
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Jam (JA)
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Condition : In ≥ Jam current setting (JA). Active only in motor running
0.5~50A : 1.5~5 times of oc setting
~60A : 1.5~4 times of oc setting |
0.3~5s adjustable |
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Imbalance (IM)
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Condition : Current imbalance ≥ Setting imbalance %
Setting range : 10~50% of imbalance |
1~10s adjustable |
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Earth fault (EF)
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Condition : EF current (Ie) exceeds setting current (Ies)
OFF, 0.03~10A |
0.05~5s adjustable
-- 3MZ2/FMZ2 only - |
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Over current
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Rated setting range (A)
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Definite TCC : 0.5~60A : use external CT higher than 60A
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Inverse TCC : 0.5~60A : use external CT higher than 32A
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Under current
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Rated setting range (A)
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0.5A ~ less than oc setting
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Operating time characteristics
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Definite(Def) / Inverse(Inv)
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Time Setting
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Def
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D-time
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0~200s
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O-time
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0.2~30s
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Inv (cLS)
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1~30 classes
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GF delay time (Edt)
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0~30s (3MZ2/FMZ2)
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GF O-time (Et)
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0.05~10s (3MZ2/FMZ2)
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Auto-reset
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0.5s~20min.
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Reset mode
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Manual reset (H-r) / Electric reset (E-r) / Auto-reset (A-r)
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Control power
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Voltage
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100~240VAC/DC (85% ~110%, Free voltage), 24VAC/DC ( ±5%) .
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Frequency
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50/60Hz
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Power consumption
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Lower than 7VA
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Output
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Capacity
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3A/250VAC resistive.
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Composition
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1a1b : OC or GR
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1a : AL
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Display
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7 segment LED
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3 phase amps, Cause of trip, Setting parameters indication.
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Bar-graph
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Load factor.
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Mounting
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Panel mounting (3DM2/3MZ2)
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Flush mounting (FDM2/FMZ2)
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Insulation
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Between case & circuit
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Over DC500V 10MΩ
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Dielectric strength
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Between case & circuit
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2kV, 50/60Hz, I Min.
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Between contacts
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1kV, 50/60Hz, I Min.
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Between circuit
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2kV, 50/60Hz, 1 Min
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Electrostatic discharge (ESD)
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IEC61000-4-2
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Level 3 : Air discharge : ±8kV, Contact discharge : ±6kV
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Radiated disturbance
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IEC61000-4-3
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Level 3 : 10V/m, 80 ~ 1000MHz
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Conducted disturbance
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IEC61000-4-6
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Level 3 : 10V,0.15 ~ 80MHz
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EFT/Burst
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lEC61000-4-4
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Level 3 : ±2kV, 1 Min.
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Surge
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IEC61000-4-5
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Level 3 : 1.2 x 50μs, ±4kV (0°, 90°, 180°, 270°)
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Emission
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CISPR11
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Class A ( Conducted and radiated)
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Environment
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Temperature
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Store
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-40°C ~ +85°C
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Operation
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-20°C ~ +60°C
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Humidity
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30~85% RH (Non-condensate)
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Weight
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3DM2 / 3MZ2
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FDM2 / FMZ2
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Window type
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265g
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350g
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Bottom hole type
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295g
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390g
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Terminal type
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295 + 120 = 415g
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390 + 120 = 510g
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Display (W/3M cable)
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125g
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Power consumption
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Less than 7VA.
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