傳統的直流電子負載十分笨重，并且體積龐大。大多數僅提供標準的電壓、電流與功率。在自動化測試設備（ATE）系統中，機架空間一般十分有限，而且隨著技術日新月異，應用需求日益多樣化。

AMREL 的 PLW 系列水冷型直流電子負載可按照客戶的需要進行定制，以滿足特定應用的要求。此外，PLW 系列還配備獨特的冷凝防護，并且擁有較高的功率密度與額定電流，并且有多種高壓型號供用戶選擇。 

PLW 系列的特點和優勢

免開蓋自動校準
選用 PLW eLoad 系列負載的用戶不必將設備返廠校準或為了調整電位計而拆卸多個螺釘。只要遵照前面板提示的 AMREL 校準程序進行操作，就可以很快地將設備恢復運行(需要某些電子測試設備)。這樣就能幾乎完全避免停產，又省去了每年的返廠校準運費。

FET 隔離保護
為確保 PLW 系列的可靠性，AMREL 的設計還增加了 FET 隔離保護功能。一臺可編程電子負載可能包含許多并聯的 FET。因此，其中一個 FET 短路就會造成級聯失效。AMREL 的 eLoad 程控負載能隔離失效的部分，保護其余部件不受影響，從而提高系統對嚴重失效的保護水平。FET 隔離保護功能可以縮短平均恢復時間 (MTTR)，使電子負載迅速恢復全面運行。

超低電壓操作
PLW 的設計讓其能在接近 0.1 V 的電壓水平下運行。它可以在不足最大額定電壓1%的電壓下消耗滿額電流。例如 60V，1500A 型號可以在 0.6 V 電壓條件下工作，但仍消耗滿額電流。

• AMREL eLoad PLW 系列規格

  General
  Models	Power Input (MAX)	Voltage (V) (MAX)	Current (A) (MAX)
  PLW6K-60-1000	6000	60	1000
  PLW6K-120-600	6000	120	600
  PLW6K-400-300	6000	400	300
  PLW6K-600-200	6000	600	200
  PLW6K-800-25	6000	800	25
  PLW6K-1000-25	6000	1000	25
  PLW9K-60-1500	9000	60	1500
  PLW9K-120-1000	9000	120	1000
  PLW9K-400-400	9000	400	400
  PLW9K-600-300	9000	600	300
  PLW9K-800-40	9000	800	40
  PLW9K-1000-40	9000	1000	40
  PLW12K-60-1500	12000	60	1500
  PLW12K-120-1200	12000	120	1200
  PLW12K-400-600	12000	400	600
  PLW12K-600-400	12000	600	400
  PLW12K-800-50	12000	800	50
  PLW12K-1000-50	12000	1000	50
  PLW18K-60-1500	18000	60	1500
  PLW18K-120-1500	18000	120	1500
  PLW18K-400-800	18000	400	800
  PLW18K-600-600	18000	600	600
  PLW18K-800-75	18000	800	75
  PLW18K-1000-75	18000	1000	75
  PLW24K-60-1500	24000	60	1500
  PLW24K-120-1500	24000	120	1500
  PLW24K-400-1200	24000	400	1200
  PLW24K-600-800	24000	600	800
  PLW24K-800-100	24000	800	100
  PLW24K-1000-100	24000	1000	100
  PLW36K-60-1500	36000	60	1500
  PLW36K-120-1500	36000	120	1500
  PLW36K-400-1500	36000	400	1500
  PLW36K-600-1000	36000	600	1000
  PLW36K-800-150	36000	800	150
  PLW36K-1000-150	36000	1000	150
  Note: Higher power available. Please contact the factory.

  General
  Models	CR Low (min) Ω	CR High (max) Ω	Vmin at Imax	LxWxH & Weight
  PLW6K-60-1000	0.0150	60	0.9	2U, 27.5"D
  PLW6K-120-600	0.0125	200	1.5	2U, 27.5"D
  PLW6K-400-300	0.0090	1333.3	3.6	2U, 27.5"D
  PLW6K-600-200	0.0200	3000	12	2U, 27.5"D
  PLW6K-800-25	0.0075	32000	6	2U, 27.5"D
  PLW6K-1000-25	0.0060	40000	6	2U, 27.5"D
  PLW9K-60-1500	0.0150	40	0.9	2U, 27.5"D
  PLW9K-120-1000	0.0125	120	1.5	2U, 27.5"D
  PLW9K-400-400	0.0090	1000	3.6	2U, 27.5"D
  PLW9K-600-300	0.0200	2000	12	2U, 27.5"D
  PLW9K-800-40	0.0075	20000	6	2U, 27.5"D
  PLW9K-1000-40	0.0060	25000	6	2U, 27.5"D
  PLW12K-60-1500	0.0125	40	0.75	2U, 27.5"D
  PLW12K-120-1200	0.0130	100	1.56	2U, 27.5"D
  PLW12K-400-600	0.0090	666.6	3.6	2U, 27.5"D
  PLW12K-600-400	0.0200	1500	12	2U, 27.5"D
  PLW12K-800-50	0.0075	16000	6	2U, 27.5"D
  PLW12K-1000-50	0.0060	20000	6	2U, 27.5"D
  PLW18K-60-1500	0.0100	40	0.6	2U, 27.5"D
  PLW18K-120-1500	0.0125	80	1.5	2U, 27.5"D
  PLW18K-400-800	0.0090	500	3.6	2U, 27.5"D
  PLW18K-600-600	0.0200	1000	12	2U, 27.5"D
  PLW18K-800-75	0.0075	10666.6	6	2U, 27.5"D
  PLW18K-1000-75	0.0060	13333.3	6	2U, 27.5"D
  PLW24K-60-1500	0.0075	40	0.45	4U, 27.5"D
  PLW24K-120-1500	0.0100	80	1.2	4U, 27.5"D
  PLW24K-400-1200	0.0090	333.3	3.6	4U, 27.5"D
  PLW24K-600-800	0.0200	750	12	4U, 27.5"D
  PLW24K-800-100	0.0075	8000	6	4U, 27.5"D
  PLW24K-1000-100	0.0060	10000	6	4U, 27.5"D
  PLW36K-60-1500	0.0075	40	0.45	4U, 27.5"D
  PLW36K-120-1500	0.0075	80	0.9	4U, 27.5"D
  PLW36K-400-1500	0.0083	266.6	3.3	4U, 27.5"D
  PLW36K-600-1000	0.0167	600	10	4U, 27.5"D
  PLW36K-800-150	0.0075	5333.3	6	4U, 27.5"D
  PLW36K-1000-150	0.0060	6666.6	6	4U, 27.5"D
  Note: Higher powers available.  Option I = Isolated Analog Programming E = Ethernet (10/100 Lan) & USB 2.0 Interface -XX = Ultra Low Range (xx = UL current rating)

  General
  Models	CRH Range Ω		CRM Range Ω		CRL Range Ω
  	Rmin	Rmax	Rmin	Rmax	Rmin	Rmax
  PLW6K-60-1000	0.6	60	0.06	15	0.0009	0.06
  PLW6K-120-600	2.0	200	0.20	50	0.0025	0.20
  PLW6K-400-300	13.3	1333.3	1.33	333.3	0.0120	1.33
  PLW6K-600-200	30.0	3000	3.00	750	0.0600	3.00
  PLW6K-800-25	320.0	32000	32.00	8000	0.2400	32.00
  PLW6K-1000-25	400.0	40000	40.00	10000	0.2400	40.00
  PLW9K-60-1500	0.4	40	0.04	10	0.0006	0.04
  PLW9K-120-1000	1.2	120	0.12	30	0.0015	0.12
  PLW9K-400-400	10.0	1000	1.00	250	0.0090	1.00
  PLW9K-600-300	20.0	2000	2.00	500	0.0400	2.00
  PLW9K-800-40	200.0	20000	20.00	5000	0.1500	20.00
  PLW9K-1000-40	250.0	25000	25.00	6250	0.1500	25.00
  PLW12K-60-1500	0.4	40	0.04	10	0.0005	0.04
  PLW12K-120-1200	1.0	100	0.10	25	0.0013	0.10
  PLW12K-400-600	6.7	666.6	0.67	166.6	0.0060	0.67
  PLW12K-600-400	15.0	1500	1.50	375	0.0300	1.50
  PLW12K-800-50	160.0	16000	16.00	4000	0.1200	16.00
  PLW12K-1000-50	200.0	20000	20.00	5000	0.1200	20.00
  PLW18K-60-1500	0.4	40	0.04	10	0.0004	0.04
  PLW18K-120-1500	0.8	80	0.08	20	0.0010	0.08
  PLW18K-400-800	5.0	500	0.50	125	0.0045	0.50
  PLW18K-600-600	10.0	1000	1.00	250	0.0200	1.00
  PLW18K-800-75	106.7	10666.6	10.67	2666.6	0.0800	10.67
  PLW18K-1000-75	133.3	13333.3	13.33	3333.3	0.0800	13.33
  PLW24K-60-1500	0.4	40	0.04	10	0.0003	0.04
  PLW24K-120-1500	0.8	80	0.08	20	0.0008	0.08
  PLW24K-400-1200	3.3	333.3	0.33	83.3	0.0030	0.33
  PLW24K-600-800	7.5	750	0.75	187.5	0.0150	0.75
  PLW24K-800-100	80.0	8000	8.00	2000	0.0600	8.00
  PLW24K-1000-100	100.0	10000	10.00	2500	0.0600	10.00
  PLW36K-60-1500	0.4	40	0.04	10	0.0003	0.04
  PLW36K-120-1500	0.8	80	0.08	20	0.0006	0.08
  PLW36K-400-1500	2.7	266.6	0.27	66.6	0.0022	0.27
  PLW36K-600-1000	6.0	600	0.60	150	0.0100	0.60
  PLW36K-800-150	53.3	5333.3	5.33	1333.3	0.0400	5.33
  PLW36K-1000-150	66.7	6666.6	6.67	1666.6	0.0400	6.67

  Constant Resistance Mode
  Transient Time Range : CRM / CRH	Same As CC Mode
  Transient Time Range : CRL	Same As CV Mode
  Temperature Coefficient :  CRM / H	300 ppm / °C of Minimum Resistance
  Temperature Coefficient : CRL	300 ppm / °C of Maximum Resistance

  Constant Resistance Mode - Program : CR Resolution*2 - 1/16000 Of Rated Value

  *1 All Mode Specification measure by 25?C room temperature unless otherwise specified *2 Transient Mode Specification must be x2

  Common
  Constant Voltage Mode	(0-V) V
  CVMedium Range	0 - ( V / 2) V
  CVLow Range	0 - ( / 10) V
  Temp Coefficient	100 ppm / °C of Rated Voltage
  Transient Time Range
  Fast Band(default, Osc1)	0.500 ~ 51.19 ms
  Slow Band(Osc2, Osc3)	0.500 ~ 511.9 ms
  CV Resolutions*2	1/16000 of rated voltage
  CV Accuracy*2 (CVH, CVM, CVL)	0.05% +/- (0.1% x Vmax) V
  Display Specifications
  CV Resolution	1/16000 of Rated Voltage
  CV Accuracy (CVH, CVM, CCL)	0.05% +/- (0.1% x V) V

  Constant Power Mode
  CPHigh Range	(0-P) W
  CPMedium Range	0 - (P/2) W @ DC input current ≤ (I/2) A
  CPLow Range	0 - (P/10) W @ DC input current ≤ (I/10) A
  Transient Time Range	Same as CC Mode
  Temperature Coefficient	300 ppm / °C of Rated Power

  Constant Power Mode : Program
  CPHigh Accuracy*2	1.00% +/- (Px0.5%) W @ input current > (I/20) A, input voltage > (V/10) V
  CPMedium Range	1.00% +/- (Px0.5%) W @ input current > (I/100) A, input voltage > (V/10) V
  CPLow Range	1.00% +/- (Px0.5%) W @ input current > (I/1000) A, input voltage > (V/5) V
  Program	CP Resolution*2 1/16000 of Rated Power

  Constant Current Mode
  CCHigh Range	0 - I A
  CCMedium Range	0 - (I/2) A
  CCLow Range	0 - (I/10) A
  Transient Time Range
  Fast Band (default, Osc1)	0.050 ~ 51.19 ms
  Slow Band (Osc2, Osc3)	0.500 ~ 511.9 ms
  Temperature Coefficient	100 ppm / °C of Rated Current

  Constant Current Mode : Program
  CC Resolution*2	1/16000 of rated current
  CCHigh Accuracy*2 LHM	0.05% +/- (Ix0.1%) A

  Constant Resistance Mode
  Transient Time Range : CRM / CRH	Same As CC Mode
  Transient Time Range : CRL	Same As CV Mode
  Temperature Coefficient : CRM / H	300 ppm / °C of Minimum Resistance
  Temperature Coefficient : CRL	300 ppm / °C of Maximum Resistance

  Constant Resistance Mode - Program
  CR Resolution*2	1/16000 of rated value

  External Programming Mode
  Monitor Output Signal	0-10 Volts output for 0 to full scale value
  VMON Accuracy	0.10% +/- (Vx0.1%) V
  IMON Accuracy	0.10% +/- (Ix0.1%) A
  Analog Program	0~10 Volts Input yields 0 -- selected full scale loading in all modes
  Accuracy	Same As Internal ± 0.1% Rating
  Input Impedance	200 k Ω ± 1 %
  BandWidth(-3dB)	Limited By Internal Transient Time
  Remote Interface	GPIB / RS-232 / ETHERNET / USB

  Programmable Protection
  Power (OPP)
  Range	(Px1.05/800) ~ (Px1.05) W
  Resolution	(Px1.05/8000) W
  Accuracy	0.50% +/- (P x 21 / 8000) W
  Voltage (OVP)
  Range	(Vx1.05/1600) ~ (Vx1.05) V
  Resolution	(Vx1.05/16000) V
  Accuracy	0.20% +/- (Vx1.05/800) V
  Current (OCP)
  Range	Ix1.05/1600) ~ (Ix1.05) A
  Resolution	(Ix1.05/16000) A
  Accuracy	0.20% +/- (Ix1.05/800) A
  Under Voltage Lockout (UVL)
  Mode	Input On / Continuous
  Range	((V/4000*3) ~ Vmax) V
  Resolution	(V/4000) V
  Accuracy	2.50% +/- (V/800) V
  Anti-Oscillation	Default/ Osc1/ Osc2/ Osc3/ Disable

  Protection
  Over Power (OP)	(Px1.05) +/- (Px0.02) W
  Over Voltage (OV)	(Vx1.05) +/- (Vx0.02) V
  Over Current (OC)	(Ix1.1) +/- (Ix1.1x0.01/1.05) A
  Over Temp (OTP)	50.00 +/- 5.000 °C
  Reverse Max Current (RCP)	(Ix1.1) A
  Short Max Current	(Ix1.02) A
  Remote Inhibit (RI)	Short
  Fault Indicator	SPDT Relay (30Vdc/0.5A or 125Vac/0.25A

  General
  AC Input	95~240 Vac 48~62 Hz
  Derating for higher temperatures	(-)1.67% Rated Power / °C
  Operating Temperature	5 °C ~ 40 °C
  Fluid
  Valve	Normal closed
  Flow Rate (Pmax)	>= 1.5~9.0 GPM @ 15 °C Fluid In
  Derating for higher temperatures	-3% Rated Power / °C
  Pressure	< 80 PSI
  Pipe Size	1/2” NPT Female (<=24kW models, 3/4” for higher power)
  Decondensation	Valve thermal control
  Transient Mode
  Frequency Range	0.100 - 10,000 Hz
  Duty Range	1.000 - 100.0%
  Transient Time Accuracy	10.0% +/- 50% of Min Time

  Dielectric Strength
  Primary Circuit To Chassis	1500 Vac for 1 min
  Primary Circuit To Load Terminal	1500 Vac for 1 min
  Load Terminal To Chassis	1500 Vdc for 1 min

• DCS：型號描述